Start Here
Essentials
Starter and Leaven
Baker's Process
Reference
Recipe Facts
Calculators
About Sourjoe
Our Vision: To be an integral partner of the Home Sourdough Enthusiast in their quest to bake healthful, delicious, gorgeous bread. Good for the body - good for the Soul.
Our Mission: To promote the ancient art of making healthful, delicious, gorgeous bread and assist as many Home Bakers as possible in doing so.
The Book of Sourjoe is designed with the home baker in mind. It's a practical, curated sourdough reference that's regularly updated — a living guide for anyone passionate about baking sourdough at home.
While the book is mainly written for beginners, each section serves as a step-by-step guide to help new bakers build confidence. For those looking to dig deeper, click the More... button in each section to dive deeper into the subject.
Howdy! If you clicked on START HERE, chances are you're new to the world of Sourjoe—and you made the right call.
If you're a novice sourdough baker, we recommend working through the following sections in order:
If you're an intermediate or experienced baker, you can probably skip these chapters—but a quick review never hurts.
Once you have read the basics outlined above, you are now ready to start on your sourdough journey. First and foremost, you will need to create your own Starter if you have not already done so by using: Basic Starter From Scratch ; that process, as you now know, will take 5 days or so to complete. After your Starter is established, you can Make Your Leaven for your bake using: Basic Leaven, Make And Use and finally, you can actually make your first (perfect) sourdough bread using: My First Bake. My First Bake recipe is very easy and yields a mildly tangy, tasty sourdough bread. Bake this loaf often to get used to the process, then move on and experiment with the more complex recipes in our lineup.
There are dozens of Ingredients and Tools used in the art of artisinal sourdough baking. Luckily
For the Home Baker, there are only a handful of essential Ingredients and Tools required. This section
outlines these essentials, and the Reference section expands on the lists.
If you are a
begginer at sourdough baking, make sure you stock-up on the essentials and read this section before
making a mess in the kitchen.
A section on Ingredients? For recipes that commonly have 3 Ingredients? Yup. Read through the details for each of the basic bread baking Ingredients and hopefully you will learn something new. Check out the Rabbit Hole to understand the role of the 'invisible' ingredients in bread baking -Time and Temperature.
Flour
Flour is the soul of your bread. Beyond being a simple powder, it is a complex collection of proteins and starches. If you are interested in the variety of grains humans use to make flour, check out our Grains A to Z section of the Reference Chapter.
The milling process is crucial: stone-ground flour retains the bran and germ, preserving nutrients and enzymes, whereas industrial roller-milling often removes these to increase shelf life at the cost of flavor and nutrition. For artisanal sourdough, Bread Flour (12-14% protein) is the gold standard for creating the strong gluten network required for an open, airy crumb.
Water
Water is the catalyst. It hydrates the flour, waking up the dormant enzymes and allowing glutenin and gliadin proteins to link into an elastic network. The "Hydration Level" (the ratio of water to flour) is the single biggest factor in determining your crumb texture: higher hydration leads to large, irregular holes, while lower hydration creates a tighter, sandwich-style crumb.
Salt
Salt does more than season; it regulates. It strengthens the gluten by tightening protein strands and slows down fermentation so the yeast doesn't "exhaust" the sugars too quickly. Most recipes use 1.8% to 2.2% salt relative to the flour weight. Without it, sourdough is bland, pale, and structurally weak.
Yeast & Bacteria
Your Starter is a SCOBY—a Symbiotic Culture of Bacteria and Yeast. The wild yeast produces the CO2 that makes the bread rise, while the Lactic Acid Bacteria (LAB) produce the acids responsible for that signature tang and improved digestibility. This long, slow fermentation process neutralizes phytic acid, making the minerals in the grain easier for your body to absorb.
This list contains the minimal list of tools you will need to bake bread at home. Click on the tool name to open the full description (from the 'Tools A to Z' section of the Reference Chapter). Note that some of the tools are redundant and are particular to the baker's preference. For instance, Lame and Scissors -> pick the scoring tool you prefer. Same for the baking vessel - you don't need to procure a Pullman or Loaf Pan if you intent to bake free-form loafs (in either a Combo Cooker or a Dutch Oven). Also note that you can substitute any other scoring, baking vessel, thermometer etc. tool that suits your baking style and budget.
For a complete list of home sourdough baking tools, go to Tools A to Z section of the Reference Chapter.
Digital Scale
Mixing Bowls
Bowl Scraper
Digital Thermometer
Proofing Baskets
Lame
Scissors
Bench Knife
Combo Cooker
Dutch Oven
Loaf Pan
Cooling Rack
The prime ingredient in bread baking is the leavening agent. In modern bread baking, the leavening agent is most commonly commercial Yeast. This class of yeast is highly specialized to rise bread quickly and consistently. It makes the bread that most people are acustomed to. This is unfortunate in that the bread is not fermented slowly which makes 'real' bread more delicious and nutricious. Commercial Yeast bread is still tasty, but because it lacks the fermenting power of natural yeast and bacteria working together, the properties of the resulting bread are not so healthful.
If you are a novice home bread baker, do not be put off by stories of mysterious and complex processes to make your own starter and leaven - read the sections of this chapter and be patient. Yes, it takes up to six days to initiate your starter, but from that point on, you will have a vibrant symbiotic colony of bacteria and yeast (a SCOBY), that if fed regularly, will live as long as you!
A Culture is the starting point—the biological embryo—of your sourdough Starter. It begins as a simple mixture of flour and water, nurtured and fed over several days (typically 5 to 7). During this time, you are cultivating a concentrated SCOBY—short for Symbiotic Culture Of Bacteria and Yeast. Once that microbial community is strong and stable, the Culture graduate to what we call a Starter.
We don't usually talk about “Cultures” during day-to-day baking because they're just the early phase of building a Starter—and you only need to go through this process once. There are many ways to kick off a Culture, but the basics are always the same: mix flour and water (sometimes with extras like yogurt or fruit juice) and wait for microbial activity to take hold. The mix is fed repeatedly over several days until it's thriving.
When your Culture begins to reliably rise and fall in volume after each feeding—typically on a 6 to 9 hour cycle at room temperature—that's the sign it has matured into a proper Starter. From that point on, we refer to it as a Starter, and rarely use the term Culture again (though some people still do).
For home bakers, a sourdough Starter is usually stored in the refrigerator in a covered container. Most keep between 225g and 450g on hand—any more than that and you'll likely end up with unnecessary waste. This excess is called discard, which builds up when the Starter is fed regularly but not used for baking as often.
Many home bakers keep a separate discard jar in the fridge to collect this excess Starter. And it's not just waste—discard can be turned into delicious things like crackers, pancakes, muffins, and more.
Once your Starter is well-established and refrigerated, it becomes remarkably resilient. Even if it takes on a vinegary smell or develops a funky aroma, the microbial community inside is usually still alive and kicking. Some bakers feed their Starter weekly, even if they're not baking; others stretch it to monthly. If left too long between feedings, a dark liquid known as hooch may form on the surface. This is normal—just a sign that it needs a refresh. Some bakers stir the hooch back in before feeding, while others pour it off. Make your Starter from Scatch
Feeding your Starter is easy: discard most of it (into your discard jar), keeping only a small amount—typically 25g is enough as a base for refreshing. A common formula is the 1:4:4 ratio: mix 25g of Starter with 100g of warm water and 100g of flour. Let it sit on the counter for 1 to 4 hours (2 hours is a good average), then cover and place it back in the fridge.
From there, you can scoop out 15g to 25g at a time to build your Leaven as needed. This can be done multiple times until the Starter jar dips below ~150g, or starts smelling overly sour and hoochy. At that point, just repeat the feeding process to bring it back to life.
A Leaven (also called a levain) is a refreshed, high-activity Starter tailored specifically for a bake. While the Starter is your "master seed" kept in the fridge, the Leaven is the offshoot brought to peak microbial activity. To build one, take a small amount of refrigerated Starter (about 15g), mix it with 60g of flour and 60g of warm water, and let it mature until it is aerated, bubbly, and has doubled in size. At this point, it is officially a Leaven.
Most single-loaf recipes require 100g to 125g of Leaven. This specific build provides exactly what you need with minimal waste. If you're scaling up for two loaves, simply double the inputs: 30g of Starter, 120g of flour, and 120g of warm water.
You'll know your Leaven is "ripe" when it reaches peak volume and smells pleasantly sweet-tart—reminiscent of yogurt or overripe fruit. A classic "ready" check is the Float Test: drop a teaspoon of Leaven into a glass of water. If it floats, the carbon dioxide production is sufficient to leaven your dough. At room temperature, this maturation typically takes 6 to 8 hours.
If baking bread was a book, these are the chapters with which every loaf of bread is told,
er... made.
The chapters range in size and complexity but never in order, even between each recipe.
We developed this system of thinking because it not only helps you gauge where you are in the process,
but what to expect next, and ultimately help you in crafting your own recipes.
There are seven chapters. Only seven? Well, yes. We spent a lot of time trying to decide how to categorize all these different steps and whether or not it was even worth it. After all, the sheer variety in something as simple as flour, water, salt, and starter is immense! Bagels, pizza dough, rustic boules, baguettes, whole meal ryes, pure white sandwich loaves, the list goes on and on, and that's not even including additional ingredients! How could you possibly funnel them all into the same seven section process?
We're going to go over each of these chapters, why they're important, why we broke them up this way, and why it's helpful from beginners to pros.
The Initial Mix is where biology meets physics. At this stage, you choose between two primary philosophies: the traditional Autolyse or the faster Fermentolyse. Your choice will dictate the extensibility of the dough and the eventual structure of the crumb.
Flour and Water (True Autolyse)A true Autolyse involves mixing only flour and water. This rest period allows dormant enzymes (amylase and protease) to begin breaking down starches and proteins. The result is a dough that is naturally smoother and more extensible (stretchy) before you even begin kneading. Because there is no yeast or salt present, the gluten bonds form freely and without the tightening effect of salt or the competitive activity of fermentation.
Many modern bakers prefer a Fermentolyse, where the leaven is included in the initial mix. This initiates fermentation immediately. While the dough still benefits from enzymatic hydration, the presence of acids from the leaven begins to strengthen the dough sooner. This method is highly efficient and is often used by bakers who want a more pronounced "sour" profile, as the bacteria have more time to produce organic acids throughout the entire process.
In both methods, salt is withheld until after this initial rest. Salt is hygroscopic—it pulls water away from the flour—and can interfere with the full hydration required for optimal gluten development during this critical first stage.
Bulk Fermentation is the most critical stage in the Baker's Process. This is when the dough comes alive. It is a dual-purpose phase: the yeast produces gas to aerate the loaf, while the baker performs a series of "Stretch and Folds" to organize the gluten into a strong, supportive structure. This stage begins the moment the Leaven is incorporated and typically lasts 3 to 5 hours depending on your kitchen temperature.
During this stage, the baker spends significantly more time waiting than working. The stretch-and-fold tasks occur every 20 to 30 minutes for up to 5 cycles. These intervals allow the gluten to relax between manipulations so it can be stretched further without tearing. Because precise timing is so vital to avoid over-proofing, the Sourjoe app provides built-in timers and notifications to keep your bake on track.
After the final stretch-and-fold, the dough is left undisturbed for a "Final Bulk Rest" (typically one hour). This allows the microbial activity to peak and the dough to fill with tiny, well-distributed gas pockets before shaping.
Once the bulk fermentation is complete, the dough is ready to be Divided and Pre-shaped. This stage is about transforming a large, fermented mass into individual, manageable loaves. After dividing, each piece is gently rounded into a loose ball to organize the surface fibers before a critical pause known as the Bench Rest.
If the dough has developed properly, it will feel airy yet resilient. You will notice the edges of the dough are rounded and "domed" rather than flat—a clear sign that the internal gas pressure and gluten strength are sufficient. During the bench rest (typically 20-30 minutes), the gluten relaxes just enough to allow for the final, tighter shaping without tearing the delicate outer skin.
Proofing is the final stage of fermentation where the shaped dough rests and expands before hitting the heat of the oven. During this time, the wild yeast produces the critical CO2 that leavens the loaf, while the bacteria finalize the flavor profile. Historically, bakers "proved" the strength of their yeast at this stage to ensure a successful bake—hence the name.
Load Dough into BannetonUsing a proofing vessel helps maintain the dough's shape and tension as it aerates. Whether you use a Banneton (cane basket), a Brotform, or a simple bowl, the vessel provides the necessary structural support. Cane bannetons are particularly favored as they allow the dough to "breathe" and wick away surface moisture, resulting in a cleaner score and a better crust.
Ambient proofing occurs at room temperature (70°F - 85°F). This is a high-speed method where yeast activity is maximized. While faster (3 - 4 hours), it produces a loaf with milder acidity and a softer, creamier crumb.
Cold proofing, or "retarding," involves refrigerating the dough (38°F - 45°F) for 12 - 24 hours. The cold temperature dramatically slows yeast activity but allows the Lactic Acid Bacteria (LAB) to continue producing complex organic acids. This results in a tangier flavor and a sturdier dough that is significantly easier to score.
The poke test is your biological "gas gauge." Gently press a floured finger half an inch into the dough. Observe the speed and depth of the rebound to determine the internal pressure.
Perfectly Proofed: The dough springs back slowly and leaves a visible, shallow indentation. It is at its maximum potential for Oven Spring.
Under-proofed: The dough snaps back quickly and completely. This means the yeast
has much more "work" to do. Baking now often causes "tunneling" or a massive, uncontrolled burst
at the weakest point of the crust.
Over-proofed: The indentation remains and doesn't rebound at all. The gluten
structure has been weakened by excessive acidity and the weight of the gas. This loaf will
likely deflate when scored and bake up flat and dense.
The Bake stage is the dramatic conclusion where your 24-hour effort is transformed by fire. This phase is a sequence of thermal events: Scoring, the Covered Bake (steam phase), the Uncovered Bake (color phase), and the Final Doneness Check.
ScoringScoring is more than decoration; it is pressure management. By making intentional incisions, you dictate exactly where the bread will expand during its rapid "oven spring." Without a score, the gas will rupture the crust at its weakest point, often resulting in a misshapen loaf.
The depth of these cuts is crucial: for room-temperature proofed loaves, scores typically range from 1/4 to 1/2 inch deep, ensuring proper expansion without compromising structure. For doughs that have undergone cold fermentation, slightly deeper cuts may be necessary due to a firm surface.
A razor-sharp Lame or fresh blade is essential to prevent "dragging" the dough.
The goal is a clean, swift stroke that allows the loaf to bloom outward without resistance.
Dull blades tear the gluten surface, leading to a jagged and stunted rise.
The first 20 minutes occur in a sealed vessel, such as a Dutch Oven or Combo Cooker. By trapping the steam released from the dough, you keep the surface hydrated and elastic. This moisture prevents the crust from setting prematurely, allowing the "Oven Spring" to reach its maximum volume.
Professional results require high initial heat—typically 500°F (260°C). This thermal shock causes the yeast to go into a final "frenzy" of gas production before the temperature reaches lethal levels for the microbes.
Baking on a stone or tray while covering the loaf with a large stainless steel bowl can achieve similar results, provided the seal is tight enough to retain the escaping moisture.
Removing the lid and dropping the heat to 450°F (232°C) shifts the focus from volume to Maillard Reaction and caramelization. This is where the complex sugars and amino acids on the surface react to the dry heat, creating the signature aroma and the deep, nutty, mahogany-colored crust characteristic of artisanal sourdough.
This second phase ensures the interior "crumb" is fully set while the exterior achieves the desired thickness and crunch. Without this uncovered time, the crust would remain pale and leathery.
A fully baked loaf will have lost 10-25% of its weight through evaporation. Traditionally, bakers "knock" on the bottom of the loaf; a hollow sound indicates that the moisture has evaporated sufficiently to leave a structured, airy interior.
For absolute precision, use a digital probe thermometer. A target internal temperature of 200°F to 205°F (93°C - 96°C) ensures that the starch has fully gelatinized and the loaf will not be gummy once cooled.
Cooling on a Rack: Once removed from the oven, place the loaf on a wire cooling rack. This promotes air circulation around the bread, preventing condensation from forming on the crust, which could lead to sogginess. Proper cooling solidifies the crumb structure and enhances the crust's crispness. During the cooling phase, sourdough bread continues to lose weight due to moisture evaporation. While the majority of water loss occurs during baking, cooling can contribute an additional 1-2% reduction in weight.
Resting Period Before Slicing: Allow the bread to rest for at least one to two hours before slicing. Many bakers wait until the bread is room temperature before slicing. Cutting too soon can result in a gummy interior, as the crumb continues to set during this time. Patience ensures a better texture and flavor development.
Storing the Bread: For short-term storage, keep the bread at room temperature in a paper bag or wrapped in a cloth to maintain the crust's integrity. Avoid plastic bags, as they can soften the crust. For longer storage, consider freezing slices in airtight bags, which can be toasted directly from the freezer when needed.
The Reference chapter provides a quick background to common sourdough baking terms. Scroll through the list or use the search tools in the header. Links to related Wikipedia article are given for some items. We have made the Reference section a little more in-depth than a simple one sentence explanation. For newcomers to sourdough baking, reading through the entire Reference section is a good idea.
more glossary stuff.
This Glossary section can be used as a quick 'A to Z' reference of sourdough baking terms. If you use the Search function in this app, it will take you directly to the term you are looking for in the Glossary (ands anywhere else that term appears). Also, if you are looking for more detailed information on a particular term, just click on it and more details will be revealed.
This section is updated regularly as we get more background information on each subject. Let us know if you have any other terms we have missed - or if you have any feedback on the content we are presenting.
This section gives the background on sourdough baking related tools. Most of these tools are common household implements - some are more specialized. Each Tool is explained by its Purpose, how it is used in the Baker's Process and some handy Tips and Techniques.
At the bottom of the expanded Tools list is the Sourjoe Rabbit Hole where we put more reading details in each section of the book. Jump into the rabbit hole and explore!
Purpose: A baker's apron is a practical garment designed to protect clothing from flour,
dough, spills, and stains during the baking process. It serves as a barrier between the baker and the often messy work of mixing,
kneading, shaping, and decorating. Typically made from durable, easy-to-clean fabric like cotton or a cotton-polyester blend, a baker's
apron also features pockets for quick access to tools like thermometers, timers, or pens, helping bakers stay organized and efficient
in a busy kitchen.
Purpose: A baking steel is a heavy-duty, ultra-heat-conductive slab of steel designed
to replicate the intense, even heat of a commercial pizza oven in a home kitchen. Its primary purpose is to drastically improve
baking results—especially for pizza, bread, and pastries—by providing superior heat transfer compared to traditional baking stones.
The dense steel absorbs and radiates heat more efficiently, resulting in perfectly crisp, blistered crusts and evenly baked goods in
less time.
Purpose: A baking stone is a thick, flat slab—typically made of ceramic,
cordierite, or other heat-retentive materials—used to mimic the dry, even heat of a traditional brick oven. Its purpose
is to create a hot, stable surface that evenly distributes heat and absorbs moisture from the bottom of baked goods. This
results in crispier crusts on pizzas, artisan breads, and pastries, while helping to prevent soggy or underbaked
bottoms.
Purpose: A bench knife, also known as a dough scraper or pastry
scraper, is a versatile handheld tool used primarily in baking and pastry work. Featuring a flat, rectangular
metal blade with a sturdy handle, its main purpose is to divide and portion dough, scrape work surfaces clean,
and assist in folding or transferring ingredients. It helps maintain efficiency and cleanliness during prep
while offering precision when working with sticky or delicate doughs.
Purpose: A bowl scraper is a flexible, curved tool designed to efficiently scrape,
scoop, and clean the sides of mixing bowls, ensuring minimal waste and thorough mixing. Typically made of food-safe plastic or
silicone, its pliability allows it to conform to the shape of any container, making it ideal for handling sticky batters,
doughs, and creams. Its purpose is to maximize yield, reduce mess, and make transferring ingredients faster and cleaner.
Purpose: A combo cooker is a cast iron baking vessel made of two parts: a deep
skillet and a shallow skillet (often used as a lid), both oven-safe and heavy-duty. Like a Dutch oven, it's used to trap
steam and radiate heat evenly during baking—ideal for achieving maximum oven spring and a blistered, crackly crust in
sourdough loaves. What sets the combo cooker apart is its flexibility: the dough is typically loaded into the shallow half,
and the deep pan is inverted on top as the lid, making loading easier and safer, especially with high-hydration or delicate
doughs.
Purpose: A cooling rack is an essential tool for the home baker. Once the
bread is baked, it must have enough air circulation around it to adequately cool it and pull away any residual moisture
in the loaf. We have mentioned the following fact before, but it bears repeating: the bread loses an additional
2%+ of weight in water while it is cooling. Without proper airflow around the loaf, the baker risks compromising the
crust and crumb of the bread.
Purpose: A couche is a heavy linen cloth used in artisan bread baking to support
and shape loaves—particularly baguettes and batards—during their final proofing stage. Its stiff, textured surface helps hold
dough in place, encouraging upward rise rather than spreading, while also drawing a small amount of moisture from the dough's
surface to promote a crisp crust. The couche prevents sticking and allows loaves to develop proper structure and definition
before baking.
Purpose: A digital weigh scale is an essential tool in sourdough baking, where
precision is key to consistent results. Unlike volume measurements, which can vary greatly depending on ingredient density and
handling, a digital scale ensures accurate weight-based measurements of flour, water, starter, and salt. This level of control
is critical for maintaining proper hydration levels, fermentation timing, and overall dough structure—especially in recipes
where a small mass difference can have a noticeable effect o the outcome of the bake.
Purpose: A digital thermometer is a vital tool in sourdough baking, used to monitor
both dough and water temperatures to ensure proper fermentation and consistent results. Since sourdough fermentation is driven
by natural yeast and bacteria, small temperature changes can significantly affect rise times, flavor development, and dough
behavior. A digital thermometer provides quick, accurate readings that help bakers stay within optimal temperature ranges
for mixing, proofing, and baking. If you do not have a digiatl thermometer, a standard, analog version will suffice. The
point is to not ignore the Temeperature of Water, Flour, Dough, etc. during the baking process.
Purpose: A Dutch oven is a heavy, lidded cast iron pot used in sourdough baking to
create the ideal environment for oven spring and crust development. The term "Dutch oven" dates back to the 1700s, when an
Englishman named Abraham Darby traveled to the Netherlands to learn a casting technique using dry sand molds. He brought the
method back to England and began producing cast iron pots, which became known as "Dutch ovens." In modern sourdough baking,
the Dutch oven's thick walls and tight-fitting lid trap steam released from the dough during the first part of baking,
mimicking the effects of a professional steam-injected oven. This steam delays crust formation, allowing the loaf to expand
fully and develop a glossy, blistered, artisan-style crust.
Purpose: A flour sifter is a baking tool designed to aerate flour, break up clumps,
and ensure even distribution of dry ingredients like baking powder, cocoa, or spices. In sourdough baking and beyond, sifting
flour helps create lighter, more uniform doughs and batters, improving texture and consistency. While not always essential for
rustic loaves, it's particularly useful when working with delicate pastries, enriched doughs, or when blending multiple dry
ingredients evenly. It also helps remove impurities from bulk-milled or whole grain flours.
Purpose: A good glass jar is an important part of maintaining a
healthy sourdough starter. It serves as the home for your wild yeast and beneficial bacteria, allowing you to feed, mix,
monitor, and discard with ease. An ideal jar should be made of clear glass so you can track fermentation activity, bubbles,
and rise levels at a glance. It should also have a wide mouth to accommodate easy mixing, scraping, and cleaning, as well as
enough headroom to allow the starter to double or triple in size without overflowing.
Purpose: A grain mill is a tool used to grind whole grains—such as wheat, rye,
spelt, or barley—into fresh flour, unlocking superior flavor, nutrition, and control over texture. In sourdough baking, using
freshly milled flour can dramatically enhance the depth of flavor and fermentation activity, as it retains the grain's natural
oils, enzymes, and nutrients often lost in commercial flours. Grain mills can be manual or electric and typically allow bakers
to adjust the coarseness of the grind to suit everything from fine bread flour to coarser meal.
Purpose: A loaf pan provides structure and support for sourdough bread as it proofs
and bakes, particularly for enriched or sandwich-style loaves that benefit from a uniform shape. Unlike free-form artisan
loaves baked on a stone or in a Dutch oven, dough baked in a loaf pan rises upward rather than outward, producing a tidy,
sliceable loaf with a soft crumb and even crust. This is especially useful for high-hydration doughs, rye blends, or bakers
seeking a more compact and practical loaf for daily use.
Purpose: You don't realy need to buy a mechanical or electronic Timer - USE THE SourJoe App!
A kitchen timer is a simple yet essential tool in sourdough baking, where timing is critical to the success of each stage—from autolyse
and bulk fermentation to stretch-and-fold intervals, proofing, and baking. Unlike conventional bread, sourdough relies on slow, natural
fermentation, which demands close attention to timing to balance flavor development, dough structure, and rise. A reliable timer helps
bakers stay organized and consistent, especially during long, multi-step processes.
Purpose: A lame (pronounced lahm) is a specialized tool used to score or slash the
surface of sourdough loaves just before baking. Equipped with a sharp blade—often curved—it allows bakers to control how and
where the bread expands in the oven. Scoring is not only functional, directing the oven spring and preventing unpredictable
splitting, but also artistic, enabling decorative patterns that showcase craftsmanship. Though traditional lames are designed
to hold replaceable razor blades, many bakers also use sharp knives or scalpels for the same purpose.
Purpose: Mixing bowls are foundational tools in the baking process, used
for everything from initial ingredient combining and autolyse to stretch-and-folds and bulk fermentation. In
sourdough baking especially, the right bowl helps support the dough's development, offers visibility during rise, and
allows comfortable handling during mixing and shaping. Available in a range of materials—glass, stainless steel,
ceramic, and plastic—each brings its own strengths depending on the task and baker preference.
Purpose: Oven mitts are essential for protecting your hands and forearms
from high heat when handling hot bakeware, especially in sourdough baking where Dutch ovens, loaf pans, and preheated
baking steels or stones can reach temperatures of 450°F (230°C) or more. A reliable pair of oven mitts isn't just
about comfort—they're critical for safety, allowing you to confidently transfer heavy, hot items in and out of the
oven without risk of burns or dropped bakes.
Purpose: Parchment paper is a nonstick, heat-resistant paper used to line
baking surfaces, making it easier to transfer dough, prevent sticking, and simplify cleanup. In sourdough baking,
it's especially helpful when transferring delicate, high-hydration doughs from proofing baskets into Dutch ovens or
onto baking stones. It acts as a gentle support system for shaping and handling, while also reducing the risk of
tearing or deflating the loaf during the critical pre-bake stage.
Purpose: A peel is a flat, paddle-like tool used to transfer bread,
pizza, or pastries to and from hot surfaces like baking stones, steels, or oven racks. In sourdough baking, it's
especially useful for moving delicate, proofed dough into a blazing-hot Dutch oven or directly onto a preheated
surface without deflating or disturbing its shape. Peels come in wood or metal, with each offering specific benefits
depending on the stage of baking.
Purpose: Proofing baskets—also known as bannetons or brotforms—are used
during the final rise (proofing) of sourdough dough to help it maintain its shape, develop structure, and create a
beautiful, rustic exterior. These baskets support the dough as it rests and rises, especially important for
high-hydration sourdoughs that might otherwise spread out and lose form. Typically made of natural materials like
rattan, cane, or lined wicker, proofing baskets allow airflow and wick a small amount of moisture from the dough's
surface, encouraging a thin, dry skin that leads to a crisp, blistered crust.
Purpose: A proofing oven—also called a proofing box or dough proofer—is a
specialized appliance or enclosure designed to maintain consistent, warm, and humid conditions ideal for yeast
fermentation and dough proofing. Professional bakers rely on these to control temperature and humidity precisely,
ensuring reliable rise times and consistent results regardless of the ambient kitchen environment. In sourdough
baking, a proofing box can optimize bulk fermentation and final proofing, especially in cooler or fluctuating
climates, promoting better oven spring and crumb structure.
Purpose: A Pullman pan—also known as a pain de mie pan—is a lidded loaf pan
designed to produce perfectly square, straight-sided loaves with a fine, tender crumb and minimal crust. Originally
developed for Pullman railway dining cars to save space and stack loaves easily, this pan is now a favorite among home
and professional bakers for sandwich breads and enriched sourdough loaves. The lid traps steam and limits oven spring,
yielding a soft, uniform structure that slices cleanly and toasts beautifully.
Purpose: While not typically used in shaping classic artisan sourdough
loaves, a rolling pin is a versatile tool with valuable peripheral applications in sourdough baking and beyond. It's
essential for evenly flattening dough when making laminated sourdough (like sourdough croissants or danishes),
crackers, tart bases, or enriched doughs such as cinnamon rolls and babka. The rolling pin helps create uniform
thickness, which ensures even baking and professional-looking results.
Purpose: Scissors can be an effective and creative alternative to a lame
for scoring sourdough, especially for bakers looking to achieve bold, controlled expansion or decorative flourishes.
With their precise cutting action, scissors allow for clean snips rather than shallow slashes, which can create
dramatic “ears,” patterns, or even floral-style scoring on your dough. While they don't slice the surface quite the
same way a razor blade does, scissors offer more depth and lift, particularly useful on high-hydration or stiff
doughs.
Purpose: A spatula is a flexible, multi-use tool that plays a key role
in various stages of sourdough baking—from mixing and maintaining your starter to incorporating ingredients and
scraping down bowls. In starter care, a silicone or rubber spatula is ideal for gently stirring, folding in flour and
water, and scraping clean the sides of jars without wasting any of your culture. During dough mixing, especially in
the early stages like autolyse or initial incorporation, it allows you to mix thoroughly while keeping your hands
clean.
Purpose: A spray bottle is a simple yet highly effective tool in
sourdough baking, primarily used to control moisture during key baking stages. Its main role is to mist the dough or
the oven interior to create steam during the early minutes of baking. Steam is essential for achieving optimal oven
spring and developing a crisp, glossy crust, especially when baking on a stone or steel without a Dutch oven. A spray
bottle is also useful during shaping and scoring to keep dough supple and prevent surface drying.
Purpose: A stand mixer is a powerful, hands-free appliance that can
streamline many tasks in sourdough baking, especially mixing and kneading. While traditional sourdough methods often
rely on hand mixing and stretch-and-fold techniques to gently develop gluten, a stand mixer offers speed,
consistency, and convenience—particularly useful for larger batches or enriched doughs with eggs, butter, or sugar.
It's also a time-saver for initial mixing and incorporating stiff or sticky ingredients evenly, which can be
challenging by hand.
Purpose: Kitchen towels are a humble yet essential tool in bread baking,
serving multiple purposes throughout the sourdough process. Most commonly, they're used to cover dough during proofing,
helping maintain humidity and prevent the surface from drying out. They also line proofing baskets or bowls when bannetons
aren't available, offering gentle support and shaping assistance. Additionally, towels are handy for wiping down floured
surfaces, drying tools, or shielding resting loaves from drafts—all while keeping the workspace clean and efficient.
Purpose: While a whisk isn't typically used for kneading or shaping, it
plays a helpful supporting role in sourdough baking—especially in the early stages of mixing and in maintaining your
sourdough starter. A sturdy whisk is ideal for thoroughly combining flour and water during starter feedings, quickly
dissolving clumps and incorporating air into the mixture to help promote fermentation. It's also useful for mixing
preferments, dry ingredients, or hydration steps like the autolyse phase when working with lower-hydration doughs.
Purpose: A wooden spoon is a classic, reliable tool in the early stages
of sourdough baking, especially when initially combining flour, water, and starter. Its sturdy construction makes it
ideal for mixing thick, sticky doughs before gluten has developed—particularly during the autolyse or first mixing
phase. It allows bakers to thoroughly incorporate ingredients with control and force, without relying on hands right
away, helping to keep things tidy and less messy during early mixing.The Grains A to Z section is a compendium of the more common grains humans have used for millenia to bake bread. Most will be familiar to you, but others may be brand new. Each grain has a brief note on History, Bread Types the grain is commonly used for, Flavour Profile, a quick Nutrition profile, and finally an Interesting Fact about the grain.
This section also has the Rabbit Hole expanded section at the end. Have fun exploring!
History: A staple of the Aztecs over 8,000 years ago, now grown in Central and South America.
History: Atta is a finely ground whole wheat flour widely used in South Asia for making staple breads. The name "Atta" originates from Hindi and Urdu, and this flour has been a key component of Indian, Pakistani, and Bangladeshi cuisines for centuries. Unlike refined wheat flours, Atta is made by stone-grinding whole wheat kernels, preserving more bran and fiber.
History: One of the first domesticated grains, barley has been grown for over 10,000 years, originating in the Fertile Crescent.
History: Domesticated in China around 6,000 years ago, buckwheat spread through Asia and Europe.
History: Native to South America, cultivated for over 8,000 years. It later spread to Africa and Asia.
History: Domesticated in Mexico over 9,000 years ago, corn became a staple in the Americas.
History: Originated in the Fertile Crescent and spread throughout the Mediterranean.
History: The oldest cultivated wheat, domesticated over 12,000 years ago in the Fertile Crescent.
History: One of the earliest cultivated wheat species, a staple in ancient Egypt and Mesopotamia.
History: A Middle Eastern grain dating back at least 4,000 years.
History: An ancient wheat variety from the Middle East, rediscovered in the 20th century.
History: Cultivated in China, Africa, and India for over 7,000 years.
History: First cultivated in Europe and the Middle East over 4,000 years ago.
History: Domesticated in the Andes over 5,000 years ago, sacred to the Incas.
History: Originating in Eastern Europe and Central Asia, rye has been cultivated for over 4,000 years.
History: Semolina is made from durum wheat (Triticum durum), one of the hardest wheat varieties, which has been cultivated in the Mediterranean and Middle East for over 2,000 years. Semolina is coarsely milled and has a distinct golden-yellow color due to its high carotenoid content.
History: One of the oldest grains, dating back over 5,000 years in Africa.
History: An ancient wheat variety dating back to 5,000 BCE.
History: Native to Ethiopia, cultivated for at least 3,000 years.
History: One of the oldest cultivated grains, dating back over 10,000 years.
History: Native to North America, used by Indigenous tribes.The world is filled with a variety of bread types. In this Chapter, we will highlight a sampling of breads. The bread types are organized in sections: Leavened Breads, Rye & Hearty Breads, Flatbreads, Enriched Breads and Traditional Breads. We have used a connection to Wikipedia since they can provide greusome detail on any of these breads. For an exhaustive list of bread types, check out Wikipedia's List of breads
It is worth a few minutes to scan even the few breads we have highlighted in our list. There are some interesting facts and surprising human connections with most bread type. Afterall, we have been consuming bread of some kind for over 10,000 years.
Focaccia
Bagel
Pretzel
Irish Soda Bread
Injera
Matzah
Stollen
Pan de Muerto
Mantou
Frybread
Recipe Factoids chapter includes Nutrition and bread-nerd facts for all SourJoe Recipes. Each Recipe card in the App has a link to these factoid cards. In some cases, a more detailed description of the Recipe or bread results is given. Live and Learn!
| Ingredient | Type | Amount | Baker's % |
|---|---|---|---|
| Total | |||
| Item | Value |
|---|---|
| Total Recipe Weight | |
| Total Recipe Flour | |
| Total Recipe Water | |
| Recipe Hydration | |
| Levain Flour % | |
| Levain % | |
| Room Temp. Bread Weight | g |
| Weight Loss | g |
| Total Loaf Calories | |
| Calories/gram |
A step-by-step video for your selected recipe will appear here.
This suite of sourdough baking oriented calculators are great tools for the home baker. Use these calculators to learn about the entity the calculator is made to calculate. Run 'what-if' scenarios when designing a custom recipe, like Hydration, Target Temperatures, etc. Scroll down or use the Table of contents icon on this panel to quickly navigate to the calculator you need.