If you want to learn how to make sourdough bread at home, here’s the short answer: you feed a flour-and-water starter until it’s active, mix it with more flour, water, and salt, let the dough ferment in stages over about a day, shape it, chill it overnight, then bake it hot and covered in a Dutch oven. No commercial yeast is involved. The wild yeast and bacteria living in your starter do all the rising.
That process sounds simple, and it is, but the details matter. Timing, temperature, and hydration decide whether your loaf turns out light and open or dense and gummy. This guide walks through every stage in plain language, explains the science just enough to help you troubleshoot, and covers the mistakes that trip up most first-time bakers.
What Makes Sourdough Different From Other Bread
Regular bread relies on commercial yeast, a single strain bred to rise dough quickly and predictably. Sourdough works differently. It’s leavened by a starter, a living culture of wild yeast and lactic acid bacteria that you cultivate yourself from just flour and water.
That culture doesn’t just make the dough rise. As the bacteria feed on the sugars in flour, they produce lactic acid and acetic acid, and those acids are what give sourdough its tang. Guidance on lactic-acid fermentation describes this as a process where naturally occurring bacteria convert carbohydrates into acid and flavor compounds, similar to what happens with yogurt, sauerkraut, and kimchi. Because the process runs slower than commercial yeast fermentation, sourdough typically takes a full day or two from starter to finished loaf, rather than the two or three hours a standard yeasted loaf needs.
What You’ll Need Before You Start
You don’t need specialty equipment to bake a good loaf, but a few tools make the process far more consistent.
| Category | What to use | Why it matters |
|---|---|---|
| Flour | Bread flour or all-purpose flour | Higher protein flour builds stronger gluten and a chewier crumb |
| Water | Filtered or dechlorinated tap water | Heavy chlorination can slow fermentation |
| Scale | Digital kitchen scale (grams) | Weight is far more accurate than cup measurements for dough |
| Mixing bowl | Large glass or stainless bowl | Non-reactive material won’t interact with the acidic dough |
| Proofing basket | Banneton or a bowl lined with a floured towel | Helps the shaped loaf hold its structure during the final rise |
| Baking vessel | Dutch oven or combo cooker | Traps steam, which is essential for a crisp crust and good oven spring |
| Bench scraper | Metal or plastic | Makes shaping sticky dough much easier |
| Lame or sharp blade | Razor blade or sharp knife | Needed to score the loaf before baking |
For ingredients, a basic beginner loaf needs just four things: bread flour, water, an active sourdough starter, and salt. Some bakers add a small amount of olive oil for a softer crumb, but it isn’t required.
Step 1: Build an Active Sourdough Starter
If you don’t already have a starter, plan on five to seven days to build one from scratch. Mix equal weights of flour and water (for example, 50 g of each) in a clean, non-reactive jar, then leave it loosely covered at room temperature. Every 24 hours, discard about half the mixture and feed it the same amount of fresh flour and water.
By days three or four, you should start seeing bubbles and a mild sour smell. By day five to seven, a healthy starter will roughly double in size within four to eight hours of feeding and smell pleasantly tangy rather than harsh or like nail polish remover. A well-maintained sourdough starter helps limit the growth of unwanted microbes, and any starter showing colored or fuzzy mold should be discarded rather than used, with the container thoroughly cleaned before starting again.
One important safety note here. Raw flour and unbaked starter are not ready-to-eat foods. Because flour is milled directly from raw grain and isn’t treated to kill bacteria, it should never be tasted or eaten before it’s fully baked, according to guidance on handling flour safely.
Step 2: Test Your Starter Before Baking
Before mixing your dough, confirm the starter is actually ready. The most common check is the float test: drop a small spoonful of starter into a glass of room-temperature water. If it floats, it’s holding enough gas to likely give your bread a good rise.
The float test isn’t perfect. A very young starter can occasionally give a false positive, and a mature, reliable starter made with heavier flours like whole wheat or rye can sometimes sink even when it’s fully capable of leavening bread. A better overall signal is consistency over several feedings: if your starter reliably doubles within four to eight hours and has a bubbly, aerated texture, it’s ready to bake with, whether or not it floats.
Step 3: Mix the Dough and Understand Hydration
Once your starter is active, it’s time to mix the final dough. A simple beginner formula uses baker’s percentages, where the flour is always treated as 100% and every other ingredient is expressed as a percentage of the flour weight.
| Ingredient | Baker’s percentage | Example (for 500 g flour) |
|---|---|---|
| Bread flour | 100% | 500 g |
| Water | 70–75% | 350–375 g |
| Active starter | 20% | 100 g |
| Salt | 2% | 10 g |
Hydration, the ratio of water to flour, has a direct effect on texture. Hydration should account for all the water in the recipe, including the water contained in the starter itself, since everything that goes into the final loaf counts toward total hydration. As a rough guide, doughs in the 60-65% range are easier to handle and produce a tighter, more sandwich-friendly crumb, while doughs above 75% are stickier to work with but tend to produce a more open, airy crumb once you’ve built up some shaping skill.
Mix the flour, water, and starter first and let the dough rest for 30 to 60 minutes before adding salt. This rest, called autolyse, gives the flour time to fully hydrate and begins gluten development without any kneading.
Step 4: Bulk Fermentation and Stretch and Folds
Bulk fermentation is the stage where most of the dough’s rise and flavor development happens. After mixing in the salt, the dough typically ferments at room temperature for four to six hours, though warmer kitchens can shorten that and cooler ones can stretch it out considerably.
During the first two hours, perform three or four sets of stretch and folds, spaced about 30 minutes apart. To do this, wet your hands, grab one side of the dough, stretch it upward, and fold it over itself, rotating the bowl a quarter turn each time. This builds gluten strength without traditional kneading and helps trap the gas the fermentation produces.
You’ll know bulk fermentation is finished when the dough has visibly increased in volume, usually by 30 to 75%, feels jiggly and full of air, and shows some bubbles on the surface. Letting it go too long causes over-fermentation, which weakens the gluten structure and leads to a flat, sticky loaf, while cutting it too short leaves you with a dense, tight crumb.
Step 5: Shape the Loaf
Once bulk fermentation is complete, turn the dough out onto a lightly floured surface. Let it rest, uncovered, for 20 to 30 minutes. This short bench rest relaxes the gluten and makes shaping much easier.
To shape a round loaf (called a boule), gently pull the edges of the dough toward the center to build surface tension, then flip it over so the seam faces down. Use a bench scraper to drag the dough in small circles against the counter, tightening the outer skin as you go. Place the shaped dough, seam side up, into a well-floured proofing basket.
Step 6: Cold Proof the Dough Overnight
Cover the shaped dough and place it in the refrigerator for 8 to 16 hours. This cold proof, sometimes called retarding, slows fermentation dramatically, which does two useful things. It develops deeper, more complex sour flavor, and it firms up the dough so it holds its shape and scores cleanly when you’re ready to bake.
Baking straight from the fridge also gives you more flexibility with timing, since a cold-proofed loaf can typically wait an extra few hours without over-proofing the way a room-temperature dough would.
Step 7: Score and Bake
Preheat your oven with a Dutch oven inside to at least 450°F (230°C) for a full 30 to 45 minutes. A properly preheated baking vessel is one of the most overlooked factors in home sourdough baking, since it’s what generates the burst of steam responsible for a crisp crust and good oven spring.
Turn the cold dough out onto parchment paper, score the top with a sharp blade in one confident, shallow cut about half an inch deep, then lower it into the hot Dutch oven using the parchment as a sling. Bake covered for 20 to 25 minutes, then remove the lid and bake for another 20 to 25 minutes until the crust is deep golden brown. Let the loaf cool completely, ideally two hours or more, before slicing. Cutting into hot bread lets steam escape too quickly and leaves the crumb gummy, even in a properly fermented loaf.
Common Sourdough Mistakes and How to Fix Them
Even careful bakers run into the same handful of problems. Here’s what typically causes them and how to correct course.
| Problem | Likely cause | Fix |
|---|---|---|
| Dense, gummy crumb | Under-fermentation or a starter that isn’t active enough | Let bulk fermentation run longer; strengthen the starter with more frequent feedings before baking |
| Flat, spread-out loaf | Over-fermentation or weak shaping | Shorten fermentation time; build more tension during shaping |
| Little to no oven spring | Oven or Dutch oven not fully preheated | Preheat for a full 30–45 minutes before baking |
| Sour, unpleasant smell in starter | Starter is hungry or contaminated | Feed more frequently; discard and restart if mold appears |
| Pale, soft crust | Baking uncovered too soon, or oven temperature too low | Bake covered longer; verify oven temperature with a thermometer |
| Sticky dough that won’t hold shape | Hydration too high for your current skill level | Reduce water by 5–10% until your shaping technique improves |
How to Store Sourdough Bread
Sourdough’s naturally acidic environment gives it a longer shelf life than most commercial bread, but it will still dry out or mold if stored poorly. Once fully cooled, keep the loaf cut-side down on a board, or wrapped in a clean kitchen towel or paper bag, at room temperature for two to three days. Avoid sealing it in plastic, which traps moisture and softens the crust.
For longer storage, slice the cooled loaf and freeze it in an airtight bag for up to three months, then toast slices straight from frozen. If you’re weighing how long any homemade dough or baked good can safely sit out on the counter before quality or safety becomes a concern, this guide on how long food can sit out safely walks through the general room-temperature guidelines worth knowing.
Is Sourdough Bread Healthier Than Regular Bread?
Sourdough has a reputation as the “healthier” bread, and there’s some real science behind parts of that claim, though it’s more nuanced than most headlines suggest. A systematic review published in the peer-reviewed journal Advances in Nutrition examined 25 randomized controlled trials comparing sourdough bread with yeast-leavened bread. The review found that in several studies using specific fermentation conditions, sourdough bread produced measurable improvements in post-meal glucose response, satiety, and gastrointestinal comfort, but the researchers were careful to note that results varied significantly depending on the strains used and fermentation time, and that no single, universal health claim currently holds up across all sourdough breads.
In plain terms: sourdough fermentation can genuinely lower a loaf’s glycemic impact and may be gentler on digestion compared with fast-rise commercial bread, largely because the longer fermentation partially breaks down starches and reduces certain compounds like phytic acid that interfere with mineral absorption. It is not gluten-free, and it is not a safe option for anyone with celiac disease or a diagnosed wheat allergy. If you have a medical condition affecting how you tolerate grains, it’s worth checking with a doctor or registered dietitian before making sourdough a regular part of your diet.
Frequently Asked Questions
How long does it take to make sourdough bread at home from start to finish?
Plan on roughly 24 to 30 hours total if your starter is already active, including mixing, a four to six hour bulk fermentation, shaping, and an overnight cold proof. If you’re building a starter from scratch first, add another five to seven days before you can bake at all.
Can I make sourdough bread without a starter?
Not true sourdough. The starter is what provides the wild yeast and bacteria responsible for both the rise and the characteristic tang, so there’s no substitute that produces the same result. You can shortcut the timeline by getting a small amount of mature starter from a friend, a local bakery, or a mail-order source instead of culturing one yourself.
Why is my sourdough bread dense instead of airy?
Dense, gummy sourdough is almost always a sign of under-fermentation, either because bulk fermentation was cut short or because the starter wasn’t active enough when you mixed the dough. Letting bulk fermentation run longer, until the dough looks visibly jiggly and increased in volume, is usually the fix.
Do I need a Dutch oven to bake sourdough bread?
A Dutch oven is strongly recommended because it traps the steam your loaf releases, which is what produces a crisp crust and strong oven spring. If you don’t have one, a covered baking stone with a metal bowl over the loaf, or a steam-injected oven, can work as an alternative.
How often should I feed my sourdough starter?
An active starter kept at room temperature typically needs feeding once every 12 to 24 hours. If you’re not baking often, storing it in the refrigerator and feeding it weekly slows fermentation enough to keep it healthy with far less maintenance.
What’s the ideal hydration level for a beginner sourdough loaf?
Somewhere between 65% and 75% hydration is a reasonable starting point. It’s wet enough to produce a decent, open crumb but still manageable for someone who hasn’t developed advanced shaping skills yet.
Can I use all-purpose flour instead of bread flour?
Yes. All-purpose flour works fine for a beginner loaf and is what many people already have on hand, though it has slightly less protein than bread flour, which can mean a marginally denser crumb. Bread flour’s higher protein content builds stronger gluten and typically gives a chewier texture.
Why does my sourdough starter smell like alcohol or nail polish remover?
A strong alcohol smell usually means the starter is hungry and has run out of food, which is a normal part of fermentation, not a sign of spoilage. Simply discard a portion and feed it fresh flour and water; the smell should mellow within one or two feedings.
How do I know when my dough has finished proofing before baking?
Gently press a floured finger into the dough about half an inch deep. If the indentation springs back slowly and leaves a slight mark, it’s ready to bake; if it springs back instantly, it needs more time, and if it doesn’t spring back at all, it may be over-proofed.
Bringing It All Together
Learning how to make sourdough bread at home takes patience more than skill. The first loaf rarely comes out perfect, and that’s normal. Every stage, from an active starter to a properly fermented dough, teaches you something you’ll use on the next bake.
Start with a simple, low-hydration recipe, pay close attention to how your dough looks and feels rather than chasing the clock exactly, and don’t be discouraged by a dense first attempt. Once you’ve got a loaf you’re proud of, it makes a wonderful base for a simple weekend spread. If you want something to go with it, this homemade strawberry jam recipe pairs beautifully with a warm, fresh slice. Get your starter going this week, and you could be pulling your first real loaf out of the oven by the weekend.
