Starch: generally extracted from corn or sweet potato.

Flour: It is made from wheat through processing.

Raw flour: Raw flour is starch, which is mainly used for thickening and snacks. In the north, it is called dough powder, which is actually no different from starch.

In essence, flour is usually ground from wheat after peeling. Starch is a nutrient stored in plants, and the starch content in various plants is higher in the seeds and tubers of plants. Starch is glucose starch obtained by separating protein from other substances, and it is a kind of plant polymer. Such as wheat, rice, sweet potato, potato, cassava and even lotus root. What we call raw flour is the floorboard of all starches, which usually refers to corn starch.

Extended data:

Raw flour is a term that often appears in recipes, and it is mostly used for thickening. The raw flour used in Chinese mainland is potato flour, the raw flour used in Hongkong is corn flour, and the glutinous rice flour used in Taiwan Province Province is Taibai, made of potatoes or cassava. In China cooking, raw flour is often used as one of the cured meat materials to soften the meat quality, in addition to thickening the food to produce a smooth taste.

Raw flour has a wide range of uses, which can be used as a seasoning for cooking, as well as bean jelly, and can also be used to spread pancakes. It is mainly used for sizing and thickening meat raw materials during processing.

References:

Baidu encyclopedia-raw flour