
A golden, crusty boule with an open crumb — the perfect everyday sourdough that never gets old.
Stir the starter into the water until cloudy. Add both flours and mix until no dry spots remain. Cover and rest for 30 minutes.
Sprinkle in the salt and work it through with wet hands. The dough will feel rough at first but smooth out quickly.
Over the next 2 hours, perform 4 sets of stretch and folds spaced 30 minutes apart. By the final fold the dough should feel elastic and airy.
Leave the dough at room temperature until it rises by about 60 percent and shows bubbles around the edges, usually 4 to 5 hours depending on your kitchen.
Pre-shape into a loose round, rest 20 minutes, then shape tightly and place seam-side up in a floured banneton. Refrigerate overnight.
Heat a Dutch oven at 250C for 45 minutes. Turn out the cold dough, score it, cover, and bake 20 minutes. Uncover and bake another 20 to 25 minutes until deep brown.