Optional Autolyse: Combine the flour and water (520g total) in a bowl, mix until no dry patches remain, and cover. Let the dough rest for 30 minutes to 4 hours. This process builds structure before adding the sourdough starter and salt. 450g bread flour, 50g whole wheat flour, 370g water Mix and Initial Stretch & Fold: Add the sourdough starter and salt to the dough. Mix by hand for a few minutes until all ingredients are incorporated. Let the dough rest for 30 minutes, then perform 1-3 minutes of stretch and folds until the dough becomes smooth. 100g sourdough starter, 10g salt Add Chocolate Chips During Stretch & Folds: During the stretch and fold process, add the chocolate chips in stages. Perform 4 sets of stretch and folds every hour during the bulk fermentation. Add a portion of the chocolate chips before each fold, sprinkling them evenly over the dough. As you fold, the chocolate chips will incorporate into the dough until all 175g are evenly distributed by the end of the folding process. 175g chocolate chips Bulk Fermentation: Let the dough ferment at room temperature until it nearly doubles in size, typically 4-7 hours, depending on room temperature. Perform 3-5 sets of stretch and folds, spacing them about an hour apart. These folds help build dough strength. Aim for at least 4 sets for optimal results.
Shape: Once the bulk fermentation is done and your dough has doubled in size, lightly flour your work surface. Shape the dough into a round boule by folding the bottom edge up, folding the sides inward, and folding the top edge down. Place the shaped dough in a proofing basket, seam side up, and dust it lightly with flour.
Overnight Rise: Cover the dough and place it in the fridge for an overnight rise, lasting anywhere from 12 to 24 hours. This cold fermentation period slows yeast activity while allowing the lactic acid bacteria to continue developing flavor, improving texture, and making the bread more digestible.
Preheat Oven & Cast Iron: Preheat your oven to 500°F (260°C) with a Dutch oven or cast iron inside for 30 minutes to 1 hour before baking. The hot cast iron creates a steam-filled environment that allows the bread to rise and develop a crispy crust.
Score the Bread: Remove the dough from the fridge and flip it onto a piece of parchment paper. Score the top of the dough at a 45-degree angle with a sharp knife or scoring blade. This step allows gases to escape while baking and helps control the shape of the loaf.
Bake: Transfer the dough into the preheated Dutch oven by lifting the parchment paper and placing the dough inside. Cover with the lid and bake for 20 minutes at 500°F. Then, remove the lid, lower the oven temperature to 450°F, and bake for another 15-20 minutes until the crust is a deep golden brown and the internal temperature reaches 208-210°F.
Cool and Enjoy: Allow the bread to cool for at least 1 hour before slicing to ensure the crumb sets. If you cut into the bread immediately, expect a slightly gummier loaf, but it will still be delicious. Slather with butter or serve alongside fried eggs for a fresh, comforting meal.