A wholesome, hearty loaf that combines the natural sweetness of plump raisins with the deep, nutty flavor of wheat bran. This naturally leavened bread is enriched with a touch of molasses, resulting in a moist crumb and a beautifully dark, rustic crust.
Starter: Mix starter, water, and flours. Let sit at 30°C (86°F) for ~4 hours until it triples in volume.
Raisins: Pour boiling water over raisins, soak for 30 minutes, then drain and set aside.
Mixing & Bulk Fermentation
Combine water, starter, salt, molasses, bread flour, and bran flakes. Mix until hydrated (dough will be sticky). Cover and rest for 30 minutes at 24-26°C (75-79°F).
Sprinkle raisins on top and perform the 1st stretch and fold.
Perform 3 more sets of stretch and folds every 45 minutes (4 sets total). The dough should almost double in size and show surface bubbles.
Shaping & Cold Proof
Flip dough onto a floured surface. Fold edges into the center and roll into a smooth, taut log.
Sprinkle bran flakes in the bottom of a proofing basket and place dough inside, seam-side up.
Cover with plastic and refrigerate for 14–24 hours.
Baking
Preheat oven to 500°F (260°C) with a baking steel or cast iron pan inside for 1 hour.
Score the cold dough and bake at 500°F covered with a Baking Shell for 15 minutes.
Remove the shell, lower the temp to 450°F (230°C), and bake for 20 more minutes.
Higher starter ratio (50%) helps manage the fermentation speed when using heavier inclusions like bran and raisins, ensuring a lighter crumb despite the hearty ingredients.