Combine all ingredients together in mixing bowl. Beat on low speed with whip attachment until combined then increase speed to medium high and beat for 5 – 8 minutes, adding 2-3 tablespoons more warm water, as necessary. Icing should be stiff enough to hold a peak when tested. Use this thick icing to outline cookies.
In large glass or metal bowl, beat powdered' sugar, egg whites, and cream of tartar at high speed for 7 to 10 minutes, or until very stiff.
Use royal icing immediately. Keep covered with a damp cloth or plastic wrap to prevent drying.
We know you want your treats to stand out in the crowd. Good news - show stopping icing has never been easier. Download this handy chart with the food color ratios for the perfect icing color. You’ll find the latest color trends as well as some classic staples. So, have fun and get creative! Your treats will be as colorful as they are delicious.