A gingerbread house is only as good as the glue that holds it together! After a bit of trial and error, I found a Royal Icing for Gingerbread Houses recipe that worked for our haunted Halloween gingerbread house. It takes just 3 ingredients to make white Royal Icing. I added a few drops of food coloring to turn ours orange. This royal icing will work great for Christmas gingerbread houses, too. For an easy to make gingerbread house, build it ...