How to Make Sourdough Bread: A Beginner's Guide to Starter, Levain, and Bake

Sourdough bread is the home baking project that produces the most genuinely impressive result for the smallest equipment investment. A round, crackling-crusted, open-crumbed loaf coming out of a dutch oven is the kind of thing that quietly tells dinner guests you know what you're doing. The technique looks intimidating — talk of "starters" and "levains" and "bulk fermentation" — but the underlying process is just flour, water, salt, and time. Once you've baked one loaf, the routine becomes second nature, and your weekend bread costs you about $1.50 a loaf for the best bread you'll eat all week.

This guide is the actual beginner's path — what to do for your first loaf, what to ignore from the internet sourdough rabbit hole, and the troubleshooting for the failures that always happen on early bakes.

Key Takeaways

• Build a starter from flour and water — takes 5-7 days, must be active before baking
• 1:2:2:2 levain ratio (starter:flour:water:salt) by weight is the beginner formula
• Bulk fermentation: 4-6 hours at 75-78°F room temp, with 3-4 sets of stretch-and-folds
• Cold proof in the fridge: 12-18 hours — this is where the flavor develops
• Bake in a preheated dutch oven at 500°F covered for 20 min, then 450°F uncovered for 20 min
• Don't slice for at least 1 hour after pulling — bread is still cooking inside

What Sourdough Actually Is

Sourdough is bread leavened by wild yeast and bacteria rather than commercial yeast. The "starter" is a stable culture of those microorganisms living in a flour-and-water mixture you maintain on the counter or in the fridge. The starter does the same job as packet yeast — producing CO2 to leaven the bread — but slower, with more complex flavor, and with the lactobacillus bacteria producing the characteristic sour notes.

The trade-off vs. yeast bread: sourdough takes 36-48 hours total from starting your levain to pulling the loaf. The active time is about 30 minutes total across that window; the rest is fermentation.

Building Your Starter (5-7 Days, One-Time)

Before you bake sourdough, you need an active starter. If you have a friend with a starter, ask for 1 tablespoon — you'll have a working starter the next day. If you're starting from scratch:

Day 1

• 50g whole wheat or rye flour
• 50g lukewarm filtered water
• Combine in a clean jar, cover loosely with a lid (not airtight). Let sit at room temperature.

Days 2-3

• Discard about half the mixture
• Add 50g all-purpose or bread flour and 50g water
• Stir, cover loosely, wait 24 hours

By day 3, you should see bubbles. The mixture should smell sour-tangy.

Days 4-7

• Continue discarding half and adding 50g flour + 50g water daily
• The starter should rise visibly (50-100% volume increase) within 4-8 hours of feeding by day 5-7
• Float test: Drop a small spoonful into water. If it floats, the starter is active and ready

A healthy starter has bubbles throughout, a domed top, and a pleasant tangy smell. It's ready to bake with when it doubles in volume within 4-6 hours of feeding.

Maintenance: Once active, feed daily at room temperature or weekly in the fridge. Most home bakers feed and use weekly.

The Equipment

You don't need much. The non-negotiables:

• Digital kitchen scale (0.1g resolution): Sourdough is measured by weight, not volume. A digital kitchen scale at ~$45 is essential.
• A large mixing bowl — glass or stainless, big enough for the dough to double
• A dutch oven with a heavy lid — the Lodge 5.5-quart cast iron Dutch oven at ~$70 is the workhorse pick. See our Best Cookware Gifts for nicer options.
• A bench scraper — for handling sticky dough. OXO Stainless Steel Pastry Scraper at ~$15.
• A banneton (proofing basket) — the round 9-inch rattan basket that gives sourdough its iconic shape. ~$20.
• A bread lame or razor blade — for scoring the loaf before baking. ~$10.
• Parchment paper — for transferring the dough into the hot dutch oven.

Optional but useful: a thermometer to check dough temperature, and a 1-quart deli container for your starter.

The Beginner Recipe (1 Loaf)

This is the formula to start with. Once you've made it 5 times, you can vary water (hydration) and flour blends.

For the dough:

• 500g bread flour (King Arthur or Bob's Red Mill — protein content 12.7% or higher)
• 375g filtered water (75% hydration — the beginner sweet spot)
• 100g active sourdough starter
• 10g fine sea salt

For the levain (built the night before):

• 25g active starter
• 50g flour
• 50g water

The Complete Sourdough Process

Night Before: Build the Levain (12 hours before mixing)

Combine 25g of your active starter with 50g bread flour and 50g water in a small jar. Mix well, cover loosely, leave at room temperature overnight. By morning, it should be doubled and bubbly.

Morning: Autolyse (1 hour before mixing in starter)

Combine 500g bread flour with 375g water in your large bowl. Mix until no dry flour remains — it'll look shaggy and rough. Cover with a damp towel and rest for 1 hour. This rest hydrates the flour fully and begins gluten development without any work from you.

Morning: Mix in Levain and Salt

After the 1-hour autolyse:

1. Add 100g of the active levain to the dough.
2. Add 10g of salt.
3. Pinch and squeeze the dough by hand for 2-3 minutes to incorporate everything. The dough will feel sticky and slack.
4. Cover with a damp towel. Note the time.

Bulk Fermentation (4-6 hours at 75-78°F)

This is where the dough develops structure and flavor. Over the next 4-6 hours, you'll do 3-4 sets of stretch-and-folds spaced 30 minutes apart, then leave the dough alone for the final 2-3 hours.

Stretch-and-fold technique:

1. With wet hands, reach under one side of the dough.
2. Stretch it upward (the dough should pull thin but not tear).
3. Fold it over to the opposite side.
4. Rotate the bowl 90 degrees and repeat.
5. Repeat until you've folded from all four sides — that's one set.

Do four sets total, spaced 30 minutes apart (so sets at 0:30, 1:00, 1:30, 2:00 of bulk fermentation).

After the final set, cover the dough and leave it alone for 2-3 more hours. The dough is ready for shaping when:

• Volume has increased about 50-75% (not doubled — that's overproofed)
• The surface is smooth and slightly domed
• Bubbles are visible at the surface and edges
• The dough jiggles slightly when you shake the bowl

Shaping

This is the step that determines the final loaf shape. Plan to spend 5 minutes here.

1. Flour your work surface lightly.
2. Use a bench scraper to release the dough from the bowl onto the surface.
3. Flour your hands lightly.
4. Fold the dough in thirds (like a letter), then fold the other two sides over the middle.
5. Flip the dough over so the seam is down.
6. With your hands cupped against the dough, drag it gently across the counter in a circular motion — this creates surface tension on the outside of the dough.

Bench rest: Cover with a towel and let rest 20-30 minutes.

Final shape: Repeat the shaping (steps 4-6 above) for tighter surface tension.

Transfer the shaped dough seam-side-up into a floured banneton (the rattan basket with rice flour generously dusted).

Cold Proof (12-18 hours in the fridge)

Cover the banneton loosely with a shower cap or large plastic bag. Place in the refrigerator for 12-18 hours.

This cold proof is where sourdough's distinctive flavor develops. The slow fermentation in cold temperatures lets the bacteria produce more lactic and acetic acid, deepening the sour and complex notes. Don't skip this step. 12 hours is the minimum; 18 hours gives the best flavor.

Bake Day: Preheat the Dutch Oven

Place the dutch oven (with the lid on) on the middle rack of your oven. Heat the oven to 500°F. Once at temperature, let it preheat for an additional 30 minutes — the dutch oven needs to be screaming hot.

Score and Bake

1. Cut a 10-inch square of parchment paper.
2. Pull the banneton from the fridge. Don't let it warm up — cold dough scores cleanly.
3. Place the parchment over the banneton.
4. Flip the banneton over so the dough lands seam-down on the parchment.
5. Score the top of the loaf — a single confident slash 1/2 inch deep across the top creates an "ear" as the loaf bakes. Don't second-guess the score.
6. Carefully transfer the parchment with the loaf into the screaming-hot dutch oven.
7. Cover with the lid. Reduce oven temperature to 475°F.
8. Bake covered for 20 minutes.
9. Remove the lid (carefully — steam will escape). Reduce oven to 450°F.
10. Bake uncovered for 20-25 minutes until the crust is deep mahogany and the bottom sounds hollow when tapped.

The Rest (Don't Skip This)

Transfer the loaf to a wire rack. Don't slice for at least 1 hour. The bread is still cooking inside as it cools, and slicing too early produces a gummy crumb.

A properly rested sourdough cuts cleanly, holds its shape, and lasts 4-5 days at room temperature in a paper bag.

Reading Your Loaf

The signs of a successful sourdough:

• Deep mahogany crust — light blonde crust means under-baked
• Significant "ear" — the raised lip from the score is the sign of good oven spring
• Open, irregular crumb — large holes of varying sizes throughout
• Crackling sound — the crust pops audibly as it cools (the "singing" loaf)
• Tangy, complex flavor — sour notes are the lactic acid from the cold proof
• Hollow sound when tapped on the bottom

Common Sourdough Mistakes

Dense, gummy crumb: Under-proofed (didn't ferment long enough) or sliced before cooling. Patience.

Flat, dense loaf: Starter wasn't active enough. Float test before using; refresh if needed.

Loaf cracks or splits randomly: Didn't score, or scored too shallow. A confident 1/2-inch deep slash is the goal.

Pale crust: Oven temperature too low, or dutch oven wasn't preheated long enough. Verify oven temperature; preheat the dutch oven 30+ minutes.

Burnt bottom: Dutch oven on the lowest rack. Always middle rack.

Sticky, hard-to-handle dough: Hydration too high for your skill level. Drop to 70% hydration (350g water) for your first 5 loaves.

Loaf is sour but flat in flavor: Bulk fermentation was too long. Reduce to 4-5 hours at 75°F.

Loaf has almost no sour flavor: Cold proof was too short. Try 18-24 hours next time.

Dough won't pass the float test: Starter needs more feedings. Continue daily feedings until it doubles within 4 hours.

Wrapping Up

Sourdough is the home baking project that rewards you with the biggest result for the smallest investment. The active time across the 36-48 hour process is about 30 minutes; the rest is fermentation doing the work.

For the right equipment, see our Best Cookware Gifts for Father's Day (the Lodge dutch oven is the workhorse) and our Best Bakeware Gifts for the broader baking-tools picture. For specific bakeware reviews, our Best Loaf Pans of 2026 review is the companion read for cooks who also want to bake yeast-leavened sandwich bread, and our Best Bakeware Sets of 2026 review covers the broader baking setup.

Once you've made your first loaf and tasted it, the routine becomes weekend ritual. Every loaf is a little different — that's the part of sourdough that keeps it interesting after the 50th bake.