Tatar powder is an acidic white powder, which belongs to food additives. The main purpose of cake room in cake making is to help protein to disperse and neutralize the alkalinity of protein, because protein is very alkaline. Moreover, the longer the eggs are stored, the stronger the alkalinity of the protein will be, and the food made with a large amount of protein will have an alkaline taste and a yellow color. Adding Tata powder can not only neutralize the alkaline taste, but also make the color whiter.

It is not the same product as active dry yeast. Yeast is an active dry yeast, and there are a lot of yeasts in it. When the conditions are suitable, it will be used as a starter to ferment raw materials.