Gua Bao, also called bao bun, is an oblong and flat mantou, which can be opened up like a wallet. Also being called the Taiwanese burger, gua bao has a fermented fluffy skin like bread. Traditional bao bun is stuffed with braised pork belly, coriander, sauerkraut, peanut powder, and etc. In Taiwan, peanut powder will be mixed with sugar powder adding some sweetness in this savory snack. Adapting the original flavor of bao buns, restaurants created new combinations. In In addition to the traditional plain wheat bun, brown sugar bun is also a popular choice. With all sorts of fillings, such as Kimchi, tempura, mushrooms, ice cream and so on, bao bun is full of variety.