Production: when the milk is heated by microwave oven until it doesn't soup fingers, add a proper amount of yeast; Add some salt, sugar and baking powder to the flour and mix well; Adding milk yeast water into flour to make thin and soft dough; Put water in the pot, heat it, turn off the fire, put the pot of flour into the pot and ferment the flour; Knead the fermented dough smoothly, because the dough is baked into powder, so there is no need to add iodine or acid. Roll the dough into a cake blank with a rolling pin with a thickness of 1cm. Brush the baking pan with oil, put the cake blanks on it, and cover your eyes with a fork, so as not to rise too much. Then the oven is preheated to 230 degrees and baked up and down for 35 minutes.