STEP 1/7
Put the rest of the ingredients except butter and red bean sediment into a kneader and knead until lumpy, add room temperature butter and finish kneading. When the elastic dough is completed, it is rounded, put it in a bowl, cover it with a wrap, and pierce the breathing holes in three to four places, and leave it at room temperature for the first fermentation. If the dough swells twice as much, the fermentation is complete.