Starch can't replace flour to make pancakes, starch is sweet potato flour, potato flour, in short, there are many kinds, while flour is wheat milled. Anyway it's just not the same thing at all.

Starch (amylum) is a polysaccharide. Making starch is a way for plants to store energy. Molecular formula (C6H10O5)n. Starch can be thought of as a homopolymer of glucose. In addition to being eaten, starch is used industrially to make dextrin, maltose, glucose, alcohol, etc. It is also used to make printing paste, sizing of textiles, gluing of paper, and pressing of pharmaceutical tablets. It can be extracted from starch-containing substances such as corn, sweet potato, wild acorn and kudzu.

Flour is a powder made from ground wheat. According to the amount of protein content in flour, it can be categorized as high-gluten flour, medium-gluten flour, low-gluten flour and gluten-free flour.

Flour (wheat flour) is the staple food in most parts of northern China, and there are many varieties of food made from flour, with a wide range of patterns and very different flavors.