This royal icing recipe, perfected over twenty years by a dentist who builds elaborate gingerbread landmarks, dries hard as cement but pipes smooth as buttercream. It’s the reliable, forgiving icing you’ll come back to every December.
For gingerbread house assembly, use a thicker consistency (stiff peaks) for walls and roof. For decorating, thin slightly with a few drops of water until it flows like honey but holds its shape (flood consistency). Keep bowl covered with a damp paper towel between uses to prevent drying. Icing can be made ahead and stored in an airtight container at room temperature for 3-4 days, in the fridge for up to a week, or frozen for up to 3 months.
Keywords: royal icing, gingerbread house, holiday baking, decorating icing, meringue powder icing