Artisan Sourdough Boule

This is the bread that changed how I think about baking. A sourdough boule is really just flour, water, salt, and time. The magic happens during the long cold fermentation, where the wild yeast and bacteria in your starter develop complex flavors that commercial yeast never could. The crust shatters when you cut it. The crumb is open and slightly tacky. The tang is subtle, not aggressive.

I have been making this loaf every week for three years. The recipe has been refined through hundreds of bakes, and every single variable matters. The hydration, the temperature of your water, the strength of your starter, the ambient temperature of your kitchen. This is not a recipe you follow once. It is a relationship you build.

Ingredients

• 100g active, bubbly sourdough starter (fed 4-8 hours ago)
• 375g lukewarm water (about 28 degrees Celsius)
• 500g bread flour (minimum 12% protein)
• 10g fine sea salt
• Rice flour for dusting the banneton

Day 1: Mix and Bulk Ferment

1. Dissolve the starter in the water by stirring with a fork until the water looks milky. Add the flour and mix until no dry spots remain. This shaggy mass is called the autolyse. Cover and rest for 30 minutes.
2. Sprinkle the salt over the dough and dimple it in with wet fingers. Then use the pincer method: squeeze the dough between your thumb and forefinger repeatedly, then fold the dough over itself. Do this for about 2 minutes until the salt is fully incorporated.
3. Over the next 3-4 hours, perform a set of stretch and folds every 30 minutes. Wet your hand, grab one side of the dough, stretch it up about 30 centimeters, and fold it over to the opposite side. Rotate the bowl 90 degrees and repeat. Four folds per set, six to eight sets total.
4. The dough is ready for shaping when it has increased in volume by about 50%, feels airy and pillowy, and holds its shape when you stop touching it. The surface should look smooth with visible bubbles just beneath.

Day 1 Evening: Shape and Cold Proof

1. Turn the dough onto a lightly floured surface. Pre-shape into a round by tucking the edges underneath, creating surface tension. Let it rest uncovered for 20 minutes.
2. Final shape: flip the dough smooth-side down. Fold the top third down, then the bottom third up (like a letter). Roll it toward you, sealing the seam. Flip seam-side up into a banneton dusted generously with rice flour.
3. Cover with a plastic bag or shower cap and place in the refrigerator. The cold proof develops flavor for 12 to 18 hours. Do not rush this step.

Day 2: Bake

1. Place your Dutch oven (with lid) in the oven and preheat to 260 degrees Celsius (500 Fahrenheit) for a full 45 minutes. The thermal mass of the pot is critical for oven spring.
2. Turn the dough out onto a piece of parchment paper. Score the top with a razor blade or sharp knife — one decisive slash about 1 centimeter deep at a 30 degree angle. This controls where the bread expands.
3. Carefully lower the dough (on parchment) into the screaming hot Dutch oven. Cover with the lid. Bake covered for 20 minutes — the steam trapped inside creates the blistered, crackly crust.
4. Remove the lid, reduce temperature to 230 degrees Celsius (450 Fahrenheit), and bake uncovered for another 20 to 25 minutes until deeply mahogany brown. Do not underbake. The color you think is too dark is actually perfect.
5. Remove from the Dutch oven and cool on a wire rack for at least one hour before cutting. Cutting into hot bread compresses the crumb and makes it gummy. Patience here is non-negotiable.