Snowballing usury, also known as bean flour cake, is one of the ancient varieties of snacks in Beijing. Its raw material is steamed with yellow wheat water, and the dough is slightly softer with more water. In addition, soybeans are fried and rolled into flour. When making, the steamed yellow wheat is wrapped with soybean powder and rolled into skin, then wrapped with red bean paste (or brown sugar), rolled up, cut into small pieces of about 100g, and sprinkled with white sugar. When making, the stuffing rolls are required to be uniform, layered and yellow in appearance, characterized by fragrance, sweetness, stickiness and strong bean flour flavor. Soybean is the main raw material of bean powder cake, so it is called bean powder cake. But why is it called "snowballing"? It seems to be an image metaphor. After making it, it is rolled in bean powder, as if the countryside is really snowballing and raising dust, hence the name. Nowadays, many people only know that the nickname is a common name, but they don't know its proper name. Nowadays, there are snack bars all year round, but most of them have changed from yellow wheat to glutinous rice noodles, because yellow bean is still yellow in color and is a favorite snack of the masses.