3. Add soft unsalted butter and knead for about 15 minutes until smooth, shape the dough in a ball greased with oil, cover with cling wrap, and ferment at room temperature (27-28 degrees) for 1 hour.
5. Release the gas of the dough and roll it out long, then add chocolate chips, roll it up and put it in a mold, cover it with plastic wrap, and ferment it at room temperature until it doubles in size.