about 5-8 minutes. Although the rice cake looks hard, it is made of cooked glutinous rice after beating and shaping. It is cooked in itself, so you can eat it as long as it is softened by heating. Among them, the time required for cooking is related to the thickness and size of rice cakes. Generally speaking, flaky rice cakes and thin rice cakes are easy to cook, as long as they are boiled in boiling soup for about 5-8 minutes.