Cold water. Steaming steamed buns with cold water, as the cold water slowly heats up, can make the steamed buns heated evenly, and the steamed buns will be soft and delicious; If steamed directly with boiling water, it will lead to uneven hardness of steamed buns and affect the taste. Moreover, steamed buns can be proofed for a short time during the process of slowly heating in cold water, which is beneficial to the soft taste of steamed buns, so it is recommended to use cold water.