What food products use steam as a raising agent?

* Yeast-raised breads: Yeast produces carbon dioxide gas as it feeds on the sugars in flour, which causes the dough to rise.

* Baking powder biscuits: Baking powder is a chemical leavening agent that releases carbon dioxide gas when it comes into contact with water.

* Cakes: Cakes are typically leavened with baking powder or baking soda, both of which release carbon dioxide gas when they come into contact with an acid.

* Muffins: Muffins are typically leavened with baking powder or baking soda, both of which release carbon dioxide gas when they come into contact with an acid.

* Steamed buns: Steamed buns are a type of Chinese bread that is made with yeast and is cooked by steaming.