The steamed buns only need to be steamed in cold water for about 15 to 20 minutes. After putting cold water in the steamer, you can put the raw buns on the drawer. In this way, throughout the heating process, the temperature of the buns and cold water synchronized with the gradual increase in temperature, can make the buns evenly heated, steamed buns and white and big, even if the fermentation time is not good and flour, but also can be greatly improved.