Beat 8 to 10 minutes. By hand, stir in optional desired tints or coloring.
Add up to 8 T of warm water if you want the icing to be a flow consistency to coat your cookies smoothly. The thicker base icing is perfect for gluing ginger bread houses together or to make thicker, fluffier details on your cookies.
Royal Icing —https://angelaskitchen.com/2006/10/21/royal-icing/