Anna Olson's Sourdough Bread Recipe: Crusty Crumb and Tangy Depth in 24 Hours

Mastering Anna Olson's sourdough bread recipe transforms your kitchen into a rustic bakery—crusty, golden crust and an open crumb so light it practically melts in your mouth. The secret lies in a 24-hour process that builds depth of flavor through careful fermentation, not shortcuts.

I’ve baked enough failed loaves to know the difference between dense disappointment and artisanal perfection comes down to patience and technique.

This recipe starts with a foolproof starter that thrives on simple ingredients—just flour and water—but requires daily attention for the first week. Once established, the dough comes together in under 15 minutes, then ferments overnight, allowing gluten to relax and flavors to develop.

The shaping technique (stretch-and-fold) ensures an even crumb, while steam in the oven creates that signature crackling crust.

By the time you pull that loaf from the oven, you’ll have a restaurant-quality sourdough with a caramelized crust and a tangy, airy interior that pairs perfectly with butter, jam, or soup.

The best part? Every batch improves as your starter matures, turning this recipe into a lifelong project rather than a one-time experiment.

Whether you’re a beginner or a seasoned baker, this method delivers consistent results without requiring expensive equipment. Let’s get started with the step-by-step guide that’s earned it a spot in home bakeries worldwide.

Ingredients for anna olson sourdough bread

Fourteen essential ingredients transform your kitchen into an artisanal bakery with Anna Olson's signature sourdough technique.

The flour is non-negotiable—King Arthur or Bob's Red Mill provide the protein structure for that open crumb. Your sourdough starter must be 100% hydration and actively bubbling; discard any sluggish starter or your loaf will lack tang. Warm water at 95-100°F jumpstarts fermentation, while ice water at the end ensures proper dough temperature. Diamond Crystal kosher salt dissolves completely, unlike table salt, which can create flavor pockets. For first-time bakers, that pinch of instant yeast provides insurance against fermentation failures, though experienced bakers can omit it entirely.

No instant yeast? Double the starter amount to compensate for slower fermentation. Substitute olive oil with melted coconut oil, though texture may vary slightly. The wooden peeler isn't strictly necessary—a metal bowl of boiling water creates steam just as effectively. For the butter, European-style unsalted melts more cleanly than American butter. If your starter is too acidic, reduce to 1.5 cups and add 0.5 cup extra flour to balance the dough. Always measure flour by weight for consistency—1 cup flour weighs 4.5 oz, not 5 oz as often assumed.

Store leftover dough in an airtight container for 24 hours in the fridge before baking. The starter thrives at room temperature but can be refrigerated for up to 1 week with weekly feedings. Butter should be kept at room temperature for 1 hour before serving to achieve perfect spreadability. For long-term storage, freeze shaped loaves unbaked for up to 3 months—thaw overnight before baking. The wooden peeler can be sanitized in the dishwasher, though hand-washing preserves its steam-generating properties longer.

Step-by-step instructions for Anna Olson's signature sourdough bread

Master Anna Olson's method for a perfectly balanced loaf with a crisp crust and open crumb.

In a large mixing bowl, combine the 16 cups unbleached all-purpose flour and the 4.5 cups warm water (95-100°F) using your hands or a dough whisk. The mixture should form a shaggy dough that's slightly sticky but manageable. This initial mix, called an autolyse, allows the flour to fully hydrate and gluten to begin developing before we add other ingredients.

Cover the bowl with a damp kitchen towel and let rest for 30 minutes. You'll notice the dough become smoother and more cohesive as the gluten relaxes. This step is crucial—it creates a lighter, more open crumb structure that's characteristic of Olson's signature bread. Don't skip it, even if you're eager to proceed.

After the autolyse, add the 2 cups active sourdough starter, 1.5 tsp kosher salt, and 0.25 tsp instant yeast to the bowl. Using a dough scraper, gently fold these ingredients into the dough until fully incorporated. The dough will become slightly firmer as the salt and starter integrate.

Add the 2 tbsp olive oil and continue folding for another 2-3 minutes until the oil is evenly distributed. The dough should now be smooth, elastic, and slightly tacky but not wet. If it feels too sticky, you may need to add 1-2 tablespoons of the 16 cups flour reserved for dusting. Cover the bowl again and let rest for 15 minutes to allow the gluten to further relax.

Wet your hands with water and perform a series of stretch and folds every 30 minutes for 2 hours total. To do this, grab one side of the dough, stretch it upward, and fold it over itself. Rotate the bowl and repeat, working your way around the dough. This technique builds strength and creates surface tension, which is essential for oven spring.

After each set of folds, cover the bowl and let the dough rest until the next interval. You'll notice the dough become smoother and more elastic with each session. The goal is to develop a well-structured gluten network that will support the bread's expansion during baking. If the dough feels too slack or sticky after the final fold, add 1-2 tablespoons of the 16 cups flour as needed.

After the final stretch and fold, let the dough undergo bulk fermentation at room temperature (around 70-75°F) for 4-6 hours, or until it has roughly doubled in size. The dough should be bubbly, jiggly, and have pulled away slightly from the sides of the bowl. Poke the dough gently with a finger—if it springs back slowly (within 1-2 seconds), it's ready for shaping.

For the final rest, shape the dough into a tight round boule or batard. Place it seam-side up in a lightly oiled bowl, cover, and refrigerate for 12-16 hours. Cold fermentation slows yeast activity, allowing flavors to develop and gluten to relax further. This step is what gives Olson's bread its signature depth and complexity.

Preheat your oven to 475°F with a Dutch oven inside for 45 minutes. Remove the dough from the refrigerator and let it sit at room temperature for 1 hour to come to proof. Shape the dough into your final loaf shape, then place it seam-side up on a piece of parchment paper dusted with 0.5 cup cornmeal. Cover loosely with a damp towel and let proof for 1-2 hours until it has risen by about 50%.

Once proofed, carefully transfer the dough (with parchment) into the preheated Dutch oven. Immediately add 1 cup ice water to the bottom of the oven to create steam, then cover the Dutch oven with its lid. Bake for 20 minutes, then remove the lid and bake for another 20-25 minutes until the bread is deep golden brown. For extra steam, use the wooden peeler to gently tap the sides of the Dutch oven during the first 10 minutes of baking.

Remove the bread from the Dutch oven and let it cool on a wire rack for at least 1 hour before slicing. This resting period allows the steam inside the loaf to escape and the crumb to set properly. If you can't resist, soften 4 oz butter and serve it alongside slices of warm bread for the ultimate experience.

The bread will continue to develop flavor as it cools. Look for a deep golden crust with visible steam pockets and an open, airy crumb. Each slice should have a satisfying crunch and a tangy depth from the sourdough starter. Store any leftovers in an airtight container at room temperature for up to 3 days, or freeze for longer storage.

Flavor customization for this anna olson sourdough bread

Sweet Variations

Transform your sourdough into a honey-wheat loaf by replacing 1 cup of the all-purpose flour with 1 cup whole wheat flour and adding 2 tbsp honey to the dough during the autolyse stage.

The honey enhances fermentation while adding subtle sweetness. For a more decadent option, fold in ½ cup dried cranberries or chopped figs during the final stretch-and-fold session. 🍯

Herb-Infused Crust

Elevate your crust with herbs and seeds by sprinkling 1 tbsp dried rosemary or 1 tbsp sesame seeds directly onto the dough before baking. For a savory twist, mix 2 tbsp finely chopped garlic and 1 tbsp black pepper into the cornmeal before dusting the baking surface.

These additions create a fragrant, textured crust that pairs perfectly with soups or charcuterie boards.

Whole Grain Boost

For a nutrient-packed loaf, replace 2 cups of all-purpose flour with 2 cups whole grain flour (like spelt or rye). Whole grains add fiber and a heartier texture, though the dough may require 10-15 extra minutes of bulk fermentation to fully develop.

To balance the denser crumb, reduce the starter to 1.5 cups and increase the warm water to 4.75 cups for better hydration.

Seeded Loaf

Create a nutrient-rich seeded sourdough by adding ¼ cup mixed seeds (sunflower, flax, and pumpkin) to the dough during the final stretch-and-fold. Toast the seeds in a dry pan for 3-5 minutes before mixing to enhance their flavor.

For extra crunch, sprinkle an additional 2 tbsp seeds on top of the dough before baking. This variation adds a satisfying bite and visual appeal to every slice.

Savory Additions

Infuse your sourdough with savory depth by incorporating ½ cup grated Parmesan cheese or ¼ cup chopped sun-dried tomatoes into the dough. For a Mediterranean twist, fold in 2 tbsp chopped kalamata olives and 1 tbsp dried oregano.

These additions create a complex flavor profile that pairs beautifully with hearty stews or as a side to grilled meats.

Spiced Variations

Add warmth with spices by mixing 1 tsp cinnamon and ½ tsp cardamom into the dough for a subtly sweet, aromatic loaf. For a smoky profile, sprinkle ½ tsp smoked paprika over the dough before baking.

These spices complement the tangy sourdough and create a versatile bread for both sweet and savory applications. 🌶️

Frequently asked questions