How to Make Sourdough Bread: Complete Beginner's Guide
Learn how to make sourdough bread from scratch. Complete guide covering starter creation, feeding schedules, shaping, scoring, and baking for perfect results.
What Is Sourdough
Sourdough bread is leavened using naturally occurring wild yeast and bacteria rather than commercial yeast. The fermentation process creates the distinctive tangy flavor, chewy texture, and crisp crust that sourdough enthusiasts prize. Wild yeast and lactobacillus bacteria live in a symbiotic culture called a starter, which you maintain by regularly feeding it flour and water. Sourdough fermentation breaks down gluten and phytic acid, making the bread more digestible and its nutrients more bioavailable. Many people who have difficulty digesting commercial bread can eat sourdough without issues because the long fermentation partially predigests the grains. The history of sourdough dates back thousands of years, predating commercial yeast by millennia. Before the 19th century, all leavened bread was sourdough. The distinctive breads of San Francisco are famous for their sourdough, thanks to the unique strain of lactobacillus found naturally in the region. The microbiology of sourdough is fascinating and well-documented by food scientists at institutions like the University of California.
Creating Your Starter
Making a sourdough starter from scratch requires only flour, water, and patience. Combine 60 grams of whole wheat or rye flour with 60 grams of lukewarm water in a clean jar. Stir thoroughly, cover loosely, and place in a warm spot, around 70 to 75 degrees Fahrenheit. Wait 24 hours. The next day, discard half the mixture and feed it with 60 grams of all-purpose flour and 60 grams of water. Repeat this feeding process daily at the same time. After 3 to 5 days, you should see bubbles forming within a few hours of feeding, indicating that wild yeast is colonizing the starter. The starter will also develop a pleasant, fruity, yeasty smell. After 7 to 14 days, the starter should double in volume within 4 to 6 hours of feeding. At this point, it is mature enough to bake with. The float test is a reliable indicator of readiness: drop a small spoonful of starter into a glass of water. If it floats, it is active enough to use. King Arthur Baking provides excellent resources for troubleshooting starter creation problems.
Feeding Schedule
Maintaining a consistent feeding schedule keeps your starter healthy and active. If you bake daily, keep your starter at room temperature and feed it once or twice per day at the same times. Use a 1:1:1 ratio of starter, flour, and water by weight. For example, 50 grams of starter, 50 grams of flour, and 50 grams of water. If you bake weekly, store your starter in the refrigerator and feed it once per week. Refrigeration slows the fermentation dramatically. Take your starter out of the refrigerator, feed it, and let it sit at room temperature for 4 to 6 hours before returning it to the refrigerator. To prepare for baking day, feed your starter 2 to 3 times at 12-hour intervals before mixing your dough. This builds up the yeast population for optimal leavening. If you notice a layer of gray liquid on top of your starter, called hooch, it means the starter is hungry. Pour off the hooch or stir it in, then feed your starter. A healthy starter smells fruity and yeasty, not like acetone or nail polish remover, which indicates it needs more frequent feeding.
Essential Ingredients
Sourdough requires only four ingredients, but quality matters. Bread flour with 11 to 13 percent protein content provides the gluten structure needed for a good crumb and rise. All-purpose flour works but produces a softer, less structured loaf. Whole wheat or rye flour adds flavor and nutrients and is often used in combination with bread flour for the final dough. Water should be filtered or non-chlorinated, as chlorine can inhibit fermentation. If your tap water is chlorinated, let it sit out overnight to allow the chlorine to evaporate. Salt is essential for flavor and for regulating fermentation. Use fine sea salt or kosher salt at about 2 percent of the flour weight. Your active sourdough starter replaces commercial yeast entirely. For enriched sourdough, you can add inclusions like seeds, nuts, dried fruit, or olives, but keep the additions to no more than 20 percent of the flour weight to avoid weighing down the dough. The quality of your ingredients directly affects the quality of your bread, so use the best flour you can find and afford. The Flour Bureau provides information about different flour types and their baking characteristics.
Mixing and Autolyse
The autolyse technique improves dough structure and flavor. Combine your flour and water, reserving the salt and starter. Mix until no dry flour remains, cover, and let rest for 30 to 60 minutes. During autolyse, enzymes break down complex carbohydrates into simple sugars that feed the yeast, and gluten begins to develop naturally without kneading. After the autolyse period, add your starter and mix it in thoroughly using a pinching and folding motion. Let the dough rest for 20 to 30 minutes. Then add the salt with a small amount of water, about 10 grams, and mix by pinching and folding until fully incorporated. The dough will feel smooth and elastic. The autolyse technique was popularized by French baker Raymond Calvel and is now standard practice in artisan bakeries worldwide. Proper autolyse reduces kneading time, improves dough extensibility, and produces bread with better volume, texture, and flavor. The temperature of your water affects fermentation speed. Use cooler water, 65 to 70 degrees Fahrenheit, for warm kitchens and warmer water, 75 to 80 degrees, for cool kitchens to maintain consistent dough temperature.
Stretch and Fold Technique
Stretch and fold replaces traditional kneading for sourdough. During bulk fermentation, perform a series of stretches and folds at 30-minute intervals. Wet your hands to prevent sticking. Reach under one side of the dough, stretch it upward, and fold it over the top. Rotate the bowl a quarter turn and repeat. Complete 4 stretches, one on each side. This technique strengthens the gluten network without deflating the dough. Perform 3 to 4 rounds of stretches and folds during the first 2 hours of bulk fermentation. After the final round, let the dough rest undisturbed for the remainder of bulk fermentation. The stretch and fold technique is gentler than traditional kneading and better preserves the gas bubbles that create an open crumb structure. It also develops gluten more evenly throughout the dough. The technique is widely taught in artisan baking courses and is essential for achieving the open, irregular crumb that sourdough enthusiasts prize. The Perfect Loaf baking blog provides detailed visual guides for the stretch and fold technique.
Bulk Fermentation
Bulk fermentation is the most critical phase of sourdough baking and the hardest to master. During bulk fermentation, the yeast and bacteria produce gas that leavens the dough while enzymes and acids develop flavor. The duration depends on temperature, starter activity, and dough composition. At 75 to 78 degrees Fahrenheit, bulk fermentation typically takes 4 to 6 hours. The dough should increase in volume by 50 to 75 percent, show bubbles on the surface, feel airy and puffy, and have a domed top rather than a flat one. The dough should jiggle when you shake the bowl and release easily from the sides. Underproofed dough is dense and gummy. Overproofed dough is flat and sticky with a sour flavor. Learning to read your dough rather than relying solely on time is the key to consistent sourdough. Keep a small sample of dough in a straight-sided jar to track fermentation visually. When the sample has risen by 50 percent, the main dough is likely ready. Temperature is the most important variable. A dedicated proofing box or a warm spot in your kitchen helps maintain consistent fermentation temperatures.
Shaping and Proofing
Shaping creates surface tension that helps the bread rise upward rather than spreading outward. Lightly flour your work surface and gently turn out the dough. Fold the left side to the center, then the right side over it. Roll the dough from top to bottom, creating a tight log. For a round boule, gather the edges to the center and flip the dough over, then drag it toward you on an unfloured surface to create tension. Let the shaped dough rest for 20 to 30 minutes, then do a final shaping. Place the dough seam-side up in a well-floured banneton or proofing basket. Cover and refrigerate for 8 to 16 hours for the final proof. Cold proofing in the refrigerator improves flavor development, makes scoring easier, and allows you to bake on your schedule. The dough is ready when it has risen about 50 percent in the banneton and passes the poke test: gently poke the dough with a floured finger. If the indentation springs back slowly, it is ready. If it springs back quickly, it needs more time. If it does not spring back, it is overproofed.
Scoring and Baking
Scoring controls where the bread expands during baking and creates an attractive pattern. Turn the proofed dough out onto a piece of parchment paper. Using a sharp lame or razor blade, make a quick, decisive cut about 1/2 inch deep at a 30 to 45-degree angle. The angle creates an ear, a raised flap of crust that is a signature of artisan bread. Common scoring patterns include a single slash, a cross, or a leaf pattern. Score quickly and confidently to prevent the blade from sticking. Preheat your oven to 500 degrees Fahrenheit with a Dutch oven inside for at least 30 minutes. Carefully transfer the dough on the parchment into the hot Dutch oven. Cover and bake at 450 degrees for 20 minutes. Remove the lid and continue baking at 425 degrees for 20 to 30 minutes until the crust is deep golden brown. The internal temperature should reach 200 to 210 degrees Fahrenheit. Cool the bread completely on a wire rack before slicing, at least 2 hours. Cutting into warm bread ruins the texture because the crumb is still setting. For more baking guidance, see our how-to-cook-rice technique page on omnidigest.space.
Troubleshooting Guide
Common sourdough problems have identifiable causes and solutions. If your bread is flat and dense, the starter may be too young or inactive, bulk fermentation may be too short, or the dough may have been overhandled. Strengthen your starter with more frequent feedings and extend bulk fermentation. If the crumb is gummy and wet, the bread may be underbaked or cut before completely cooled. Bake to a higher internal temperature and let cool fully. If the crust is too thick and hard, the oven may be too hot, or the bread may have baked too long without steam. Reduce baking temperature and ensure proper steam in the first 20 minutes. If the flavor is too sour, bulk fermentation may be too long, or the starter may be too acidic. Use the starter at its peak rather than after it has fallen. If the bread does not rise in the oven, the dough may be overproofed, the oven may not be hot enough, or the scoring may be too shallow. Troubleshooting sourdough is a learning process that improves with each batch. The Sourdough School website offers comprehensive troubleshooting resources for all common sourdough problems.