First of all, we should mix the high-gluten flour with water, knead the dough, put it into the water to wash out the gluten, put the washed gluten into the steamer to steam, and the washed out slurry water is poured into the flour, and stirred well. Strain the thick batter. Brush a layer of oil on the steamer plate and pour the strained batter evenly. Put into the oven, and finally take out the made cold skin.