01 -
Mix starter, water and flour. Let rise 3-4 hours at 78°F until doubled and bubbly.
02 -
Heat coconut oil and cocoa powder together. Let cool completely.
03 -
Combine levain, sugar, cocoa mix, water, salt and flour. Rest 30 minutes.
04 -
Perform 4 sets of stretch and folds every 30 minutes, adding chocolate chips during second set.
05 -
Let rise 1.5-2 hours until domed with bubbles. Transfer to oiled pan, stretch to fill.
06 -
Cover and refrigerate overnight.
07 -
Let come to room temp and rise 3-5 hours until puffy.
08 -
Top with butter and chocolate, dimple surface. Bake at 425°F for 25-30 minutes.