Kat Lieu is the author of 108 Asian Cookies and the founder of Subtle Asian Baking. Through the decades, royal icing has been the edible glue of choice when it comes to building gingerbread houses.

We may receive a commission on purchases made from links. When you're looking to top your baked goods, there's a range of icings you might use. One of the most common types is buttercream icing, which ...