Bao is a traditional Chinese steamed bun that is a popular street food in many Asian countries. These soft, fluffy buns are typically filled with a variety of ingredients such as pork, vegetables, or sweet fillings like red bean paste or custard. Bao is often served as a snack or appetizer at dim sum restaurants, but can also be found at food trucks and markets. The dough for bao is made with yeast, flour, sugar, and water, giving it a chewy and slightly sweet flavor. Bao is usually shaped into a round bun and is steamed until it puffs up and becomes light and airy.