Fried tofu fish with cornstarch.

When making fried food, coating the outer layer of the food with a layer of cornstarch can not only give the food a smooth and crispy texture, but also retain the juice of the food. In addition to being used for fried foods, cornstarch can also be used to thicken the food soup and make the food soup thicker. It is often used for stir-frying.

Cooking flour is a term that often appears in recipes. It is mostly used for thickening, starching, and making. The cornstarch used in mainland China and Taiwan is potato flour, and the cornstarch used in Hong Kong, China. Generally refers to windmill super corn flour (potato starch) and chestnut flour (corn starch) imported from Europe.