Whisk ingredients together thoroughly in a bowl. A thick, paste-like mixture should form.
Use a pastry brush to apply to cooled treats.
*Refrigerate iced treats to avoid spoilage.
If you don't want to use chemical food colorings, try adding a coloring from an all-natural
source such as raspberry juice for red, turmeric for yellow, or blueberry for blue.
Click here for more info on natural food coloring.