Rustic Walnut Sourdough Bread

Rustic walnut sourdough bread is a tangy, open-crumb loaf with dark-roasted walnuts baked throughout. The long fermentation develops deep flavor and creates that signature sour taste, while a hot Dutch oven traps steam for a crisp, crackled crust. This method works because time and temperature do the heavy lifting.

Ingredients for Rustic Walnut Sourdough Bread

Bread flour provides structure and holds the dough together. Water hydrates the flour and feeds the fermentation. Active sourdough starter is the leavening agent and brings sourness. Salt strengthens the dough and slows fermentation so flavor can develop. Walnuts add nutty richness and a slight bitterness that balances the tang.

Why This Rustic Walnut Sourdough Bread Works

A long, cool fermentation breaks down the flour gradually and builds flavor compounds that you cannot get from a quick rise. The sourdough starter creates acid as it works, which gives the bread its sour taste and also helps develop a darker, crispier crust in the oven.

Toasted walnuts are mixed in after the first rise, once the dough is strong enough to hold them without deflating. They stay distributed throughout instead of sinking to the bottom. Baking the loaf in a preheated Dutch oven traps steam, which keeps the crust from setting too fast and allows the dough to expand fully before it firms up.

Mistakes To Avoid

Using cold or weak starter will slow fermentation so much that your dough never rises properly. If the starter is pale or sits flat for hours after feeding, feed it again and wait for it to become bubbly and roughly double before you use it.

Skipping the windowpane test or the poke test means you cannot tell if the dough is strong enough. A properly developed dough stretches thin enough to see light through it without tearing, and a poked finger leaves an indent that does not spring back all the way.

Baking in a cold Dutch oven or without a lid will not trap enough steam. The crust will be pale and thick instead of dark and crisp. Always preheat the Dutch oven for at least 30 minutes at full oven temperature.

Slicing before the loaf cools all the way through will compress the crumb and make it gummy. The interior is still setting as it cools, and cutting into warm bread tears the structure. Wait at least 1 hour after it comes out of the oven.

As an Amazon Associate, we earn from qualifying purchases.

Ingredients

• 500 grams (3 1/2 cups) bread flour
• 350 milliliters (1 1/2 cups) water
• 100 grams (1/2 cup) active sourdough starter, fed 4 to 8 hours prior
• 10 grams (2 teaspoons) salt
• 150 grams (1 1/2 cups) walnuts, toasted and cooled

Step-by-step Instructions

1. Mix flour, water, and starter in a large bowl until no dry flour remains, about 2 minutes. Let it rest 30 minutes at room temperature.
2. Add salt and pinch it into the dough with your fingers, working it in for 2 to 3 minutes until fully incorporated.
3. Perform a stretch and fold: lift one side of the dough and fold it over the center, rotate the bowl a quarter turn, and repeat 4 times, every 30 minutes, for 2 hours total.
4. After the last fold, let the dough rest 30 minutes, then gently turn it out onto a lightly floured surface and flatten it into a rough rectangle.
5. Scatter toasted walnuts over the dough, then fold the dough in half and knead gently 6 to 8 times to distribute them evenly without crushing them.
6. Shape the dough into a round boule: pull the top edge down and toward you, rotate slightly, and repeat around the perimeter until it feels taut on top.
7. Place seam side up in a floured banneton basket, cover with plastic, and refrigerate 12 to 16 hours or until a poke test leaves an indent that springs back slowly.
8. Preheat your oven and Dutch oven to 475°F (245°C) for 30 minutes with the oven rack in the middle position.
9. Turn the dough seam side down onto a piece of parchment, score the top with a sharp knife or lame in an X or slash pattern about 1/4 inch deep, then transfer to the hot Dutch oven on the parchment.
10. Cover and bake 20 minutes at 475°F (245°C), then remove the lid and bake 25 to 30 minutes more until the crust is deep golden brown and an instant-read thermometer inserted into the center reads 205 to 210°F (96 to 99°C).
11. Turn the loaf out onto a wire rack and cool completely, at least 1 hour, before slicing.