10:00 PM – Starter Initialization: In a clean glass jar, add the 5g of mature sourdough starter culture to 35g of room-temperature water and whisk together thoroughly. Stir in 30g of all-purpose flour and 5g of rye flour until no dry pockets remain. Cover loosely and let it sit at room temperature 74–78°F (23–26°C) overnight for 8 to 10 hours until the starter triples in volume.

The Beer Alcohol Evaporation: Pour your 228g of dark beer into a small saucepan set over low heat. Warm the beer gently for 10 minutes—do not boil it aggressively, just allow it to simmer slightly. This process evaporates the raw alcohol, which would otherwise stunt or kill the wild yeast cells. Remove from the heat and let the beer cool down completely at room temperature overnight alongside your levain jar.

8:00 AM – The Flour Hydration: In your stand mixer bowl, combine your cooled dark beer with the 270g of bread flour, 30g of stone-ground whole wheat flour, and the optional 3g of malt powder. Mix with a heavy spoon or your hands just until a shaggy, raw dough mass forms and no dry spots remain. Cover the bowl and let it rest for 1 full hour to complete the autolyse, fully hydrating the flour starches and activating natural gluten linkages.

9:00 AM – Levain Integration: Pour 60g of your mature, peak-ripened overnight levain and the 30g of honey directly over the autolysed dough.

Mechanical Mixing: Secure the bowl in your stand mixer fitted with the dough hook. Mix on low speed for 2 to 3 minutes (or use speed 3 on a KitchenAid mixer for 3 to 4 minutes) until the starter and honey are completely incorporated. Cover and let the dough rest for 30 minutes.

9:30 AM – Salt Addition & High-Speed Build: Sprinkle the 6g of fine sea salt evenly over the dough surface. Mix on a low speed for 2 to 3 minutes (or KitchenAid speed 3 for 5 to 6 minutes) until well incorporated. The dough should pull together into a cohesive ball but remain slightly sticky on the bottom. Cover and leave to rest for 30 minutes at 74–78°F (23–26°C).

10:00 AM – The Chocolate Chip Lamination: Spray your work surface lightly with water and wet your hands. Tip the dough onto the counter and gently stretch it outward horizontally and vertically as thin as you can go without ripping it. Sprinkle your 75g to 100g of dark chocolate chips uniformly across the entire surface of the stretched dough sheet. Fold the dough cleanly like a letter into thirds, roll it up into a compact package, and place it back into a clean proofing container. Let rest for 45 minutes.

Progressive Structural Folds: Continue building vertical dough strength around the chocolate inclusions by executing regular stretch-and-folds spaced 45 minutes apart: 1st fold at 10:45 AM, 2nd fold at 11:30 AM, and the 3rd/final fold at 12:15 PM.

Final Bulk Proof: Following the final fold, let the dough proof undisturbed at 76–80°F (23–26°C) until you look for a distinct lightness, small surface bubbles, and a 40% to 50% volume expansion.

12:45 PM – Preshaping: Transfer the fermented dough out onto your work surface and dust the top lightly with flour. Using your scraper, flip the dough over so the floured side faces down against the counter. Fold the dough cleanly onto itself so that the flour remains entirely on the outside of the loaf, shape into a loose round ball, and let it rest uncovered on the counter for 30 minutes to relax the gluten mesh.

1:15 PM – Final Shaping: Dust the top with a little whole wheat or bread flour and use a scraper to flip it over floured-side down. Starting at the side closest to you, pull the right two corners of the dough to the left, then fold them up into the half of the dough. Repeat this identical action on the left side. Finally, roll the dough tightly away from you into a smooth, taut, high-tension cylinder or round boule.

Basket Transfer & Cold Retard: Place the shaped loaf seam-side up into a prepared proofing basket heavily dusted with flour. Cover it loosely with plastic wrap to trap the moisture. Return the dough to a warm 80°F (27°C) environment for exactly 15 minutes to jumpstart yeast activity, then transfer the covered basket directly into the refrigerator to undergo a slow cold fermentation for 14 to 24 hours.

The Next Day – Oven Preheating: Place your cast-iron Dutch oven and its lid inside your home oven. Turn the temperature up to 500°F (260°C) and let it preheat thoroughly for 45 minutes to 1 hour.

Inversion and Scoring: Remove the cold dough basket directly from the fridge. Invert it cleanly onto a sheet of parchment paper. Use an ultra-sharp knife or scoring lame to cut a clean decorative slash across the crown.

The Dutch Oven Bake: Carefully transfer the dough into the smoking hot cast-iron pan using the parchment paper handles. Cover tightly with the lid to lock in the escaping steam and bake at 500°F (260°C) for exactly 15 minutes.

The Crisp Finish: Remove the lid to vent the steam, reduce the oven temperature down to 450°F (232°C), and continue baking uncovered for an additional 20 minutes until the crust achieves a deep, dark mahogany finish. Transfer the baked loaf onto a wire rack and let it cool completely for at least 2 hours before slicing.