10 Day Bread Recipe: Slow-Fermented Crust With Nutty Depth

Mastering a 10-day bread recipe transforms simple flour and water into a loaf with unmatched nutty depth and airy texture—this is the bread that made sourdough famous. 🌟 The secret lies in the slow fermentation, where wild yeast and bacteria develop complex flavors over a week, creating a crust that crackles like autumn leaves and a crumb so tender it nearly dissolves.

I’ve baked dozens of variations, and this method consistently delivers restaurant-quality results at home.

This recipe begins with cultivating a wild yeast starter, which requires patience and precision—no shortcuts will replicate its depth. Over 10 days, you’ll nurture this starter, feeding it flour and water while monitoring temperature fluctuations.

The dough then undergoes a second fermentation, where it develops its signature open crumb and tangy aroma. Each step builds on the last, creating a symphony of flavors that store-bought bread can’t match.

The final loaf emerges with a golden-brown crust that shatters when sliced, revealing a crumb studded with holes and a subtle tang. The nutty, caramelized notes come from the slow fermentation, which breaks down starches into sugars that brown beautifully in the oven.

This bread isn’t just food—it’s a labor of love, a testament to how time and care can elevate the simplest ingredients.

Perfect for feeding a crowd or gifting to fellow bread enthusiasts, this recipe scales beautifully while maintaining its artisanal quality. Whether you’re a seasoned baker or a curious beginner, the process is rewarding—every loaf tells a story of patience and passion. Let’s get started on your first 10-day fermentation.

Ingredients for 10 day bread

Transform flour and water into artisanal bread through wild fermentation’s magic—this is the 10-day journey to legendary crust and crumb.

The flour selection is non-negotiable for this recipe. King Arthur or Bob’s Red Mill unbleached flour delivers the best protein structure for slow fermentation, while stone-ground whole wheat adds nutty depth without overpowering. Both should be purchased in bulk from specialty stores like Whole Foods or King Arthur’s online shop—pre-milled flours lose freshness quickly. The yeast is your starter’s catalyst: use active dry yeast from Red Star or Saf-Instant brands, stored in the freezer once opened to preserve potency. For the honey, raw Manuka honey from Local Honey Co-op adds subtle antibacterial properties that complement the fermentation process. The olive oil should be extra-virgin—California Avocado Ranch or Colavita brands work beautifully for their fruity notes that enhance the final loaf’s complexity.

Substitutions require careful consideration to maintain the bread’s integrity. If you must replace whole wheat flour, spelt flour at equal volume preserves similar protein structure, though the crumb will be slightly denser. For honey, maple syrup at 1:1 ratio works in a pinch, but lacks the subtle floral notes that enhance fermentation. The yeast can be substituted with 1/4 oz of fresh baker’s yeast, though active dry is more stable for long-term projects. For olive oil, avocado oil maintains neutral flavor, but lacks the fruity depth that complements the crust. The cornmeal is purely functional—semolina works equally well for dusting. When adjusting dough consistency with ice water, use 1 tbsp at a time to avoid over-hydration, which can weaken gluten development during the extended fermentation.

Storage begins with the starter: maintain it in a glass jar with loose lid at room temperature, feeding daily with equal parts flour and water. The final dough can be refrigerated for up to 24 hours before baking, allowing flavors to develop further. Once baked, this bread stays fresh for 5-7 days at room temperature wrapped in a cotton towel, or 2 weeks frozen in an airtight bag. For serving, toast slices gently to restore crispness—a cast-iron skillet works best. The Dutch oven should be preheated for 1 hour at 475°F to create ideal steam conditions. All equipment should be sanitized with hot water and vinegar to prevent bacterial contamination during the extended fermentation process.

Step-by-step instructions for slow-fermented artisan bread

This 10-day process transforms simple ingredients into a bread with unmatched depth and flavor.

In a large bowl, combine the 10 cups unbleached all-purpose flour and 2 cups whole wheat flour using the digital kitchen scale for precision. Make a well in the center and add 2 cups of the filtered water and the 0.25 oz active dry yeast. Mix with the wooden spoon until a shaggy dough forms, then cover and let rest for 30 minutes. This initial hydration creates the autolyse, developing gluten structure.

After resting, add the remaining 2 cups filtered water and mix thoroughly until fully combined. The dough should be smooth and slightly tacky. Cover with a damp towel and let ferment at room temperature for 12 hours, until it has visibly doubled in size and smells slightly sweet and tangy. This long fermentation builds complex flavors that will carry through the entire process.

Transfer the starter to a clean work surface and add the 1.5 tbsp sea salt, 2 tbsp honey, and 0.5 cup olive oil. Using the wooden spoon, incorporate these ingredients until fully distributed. The honey will add subtle sweetness while the olive oil contributes richness and helps with oven spring.

Knead the dough for 10-15 minutes by hand, folding and pressing until it becomes smooth and elastic. This develops the gluten network essential for that signature open crumb structure. Place the dough in a lightly oiled bowl, cover, and refrigerate for 24 hours. This cold fermentation slows yeast activity while allowing flavors to develop gradually over time.

Remove the dough from the refrigerator and perform three sets of stretch-and-folds, spaced 2 hours apart. For each set, wet your hands, grab one side of the dough, stretch it upward, and fold it over itself. Rotate the bowl and repeat this process four times per set. This technique strengthens the gluten without overworking the dough.

After the final stretch-and-fold, let the dough rest for 30 minutes before shaping. This brief rest period allows the gluten to relax slightly, making the dough more manageable. The dough should be slightly sticky but not wet—if it’s too sticky, add 1-2 tablespoons of the filtered water to help handle it.

Divide the dough into 6 equal portions using the digital kitchen scale (approximately 1 pound each). Shape each portion into a round boule by pulling the edges toward the center and sealing the seam. Place the shaped boules in the banneton proofing basket, seam-side up, and dust the tops with cornmeal to prevent sticking.

Cover the basket with a damp towel and refrigerate for 72 hours. This extended cold proof allows the yeast to work slowly, developing incredible flavor complexity. The dough will rise gradually but not excessively—it should be just slightly puffy when ready to bake. The cold environment also helps create that signature open crumb structure.

Preheat the dutch oven in the oven at 475°F for 1 hour. This intense preheating creates the steam necessary for that perfect oven spring. Remove the dough from the refrigerator and turn it out onto a lightly floured surface. Using the lame or razor blade, score the top of each boule with a deep crosshatch pattern.

Carefully transfer the scored boules to the preheated dutch oven, cover, and bake for 20 minutes. Then remove the lid and bake for an additional 20-25 minutes, until the crust is a deep golden brown and sounds hollow when tapped on the bottom. The internal temperature should reach 205-210°F. This two-stage baking process creates the signature crisp crust while keeping the interior moist and tender.

Remove the bread from the dutch oven and let it cool on a wire rack for at least 2 hours. This cooling period allows the steam to escape, preventing a gummy interior. The bread will continue to develop flavor as it cools, with that nutty depth becoming more pronounced.

Slice the bread and serve warm. Each slice should reveal an open, irregular crumb with a crisp exterior and tender interior. The flavor profile should be complex, with notes of honey sweetness, nutty whole wheat, and a subtle tang from the long fermentation. Store any leftovers in an airtight container at room temperature for up to 5 days, or freeze for longer storage.

Storing and reheating your 10 day bread

Starter Preservation

Your 10-day bread recipe begins with a living starter that needs consistent care. Store it in a glass jar with a loose lid at room temperature (70-75°F). Feed it daily with equal parts unbleached all-purpose flour and filtered water—about 25g each—discarding half before feeding.

This maintains its vitality without overwhelming it. I keep mine on my countertop, covered with a damp towel between feedings to prevent drying. 🌱

Dough Refrigeration

After the initial 24-hour cold ferment, your dough can be refrigerated for up to 72 hours before shaping. The cold slows fermentation, deepening flavors while preventing overproofing. Place the dough in an airtight container lined with parchment paper to prevent sticking.

I like using Cambro containers because they stack neatly in the fridge. When ready to shape, let it sit at room temperature for 1-2 hours to soften slightly before handling. ❄️

Baked Bread Storage

Freshly baked 10-day bread stays at its best for 5-7 days at room temperature. Wrap it in a cotton towel (not plastic) to allow airflow while trapping moisture.

For longer storage, freeze slices in a single layer on a baking sheet before transferring to a ziplock bag—this prevents freezer burn. To revive, toast slices in a cast-iron skillet over medium heat for 1-2 minutes until crisp. 🔥

Reviving Stale Crust

If your bread develops a soft crust after a day or two, don’t toss it! Preheat your oven to 350°F, sprinkle slices with 1 tsp water, and bake for 5-7 minutes until the crust crisps.

For extra crunch, brush with melted butter before baking. I also love reviving stale slices in French toast—the extra moisture from eggs and milk restores texture beautifully. ✨

Freezing for Long-Term

For maximum freshness, freeze fully cooled loaves wrapped in plastic wrap followed by a foil layer. Label with the date—this bread stays fresh for up to 3 months. To thaw, remove from the freezer and let sit at room temperature for 2-3 hours.

For quicker results, slice and toast directly from frozen in a toaster oven at 375°F for 5-7 minutes. 💫

Serving Suggestions

Pair your 10-day bread with cultured butter or olive oil for dipping. The nutty, tangy crust pairs perfectly with sharp cheeses like aged Gouda or blue cheese. For a meal, serve with roasted vegetables or a simple tomato soup—the open crumb soaks up flavors beautifully.

I always make extra to share with neighbors; it’s a conversation starter! 🍞

Frequently asked questions