1, starch is not sweet potato flour. Sweet potato starch is a kind of starch, sweet potato flour is sweet potato dried and broken components, also called sweet potato flour. Sweet potato starch is extracted from sweet potato starch components. Cooking starch, mainly mung bean starch, tapioca starch, sweet potato starch, sweet potato starch, potato starch, wheat starch, rhododendron starch, lotus root starch, corn starch and so on.

2, cooking, the main role of starch is thickening. When the dish is almost out of the pot, pour the water starch OR the mix of water starch and other ingredients to make the soup thicker, after the starch thickening stir-fried dishes, not only to improve its texture, taste, but also to make the color of the dish brighter and more attractive. Starch is literally starch with water, usually 2 teaspoons of dry starch + 2 tablespoons of cold water and mix well, the addition of water can not be too much, too thin, it can not play the role of thickening.