Royal Icing

3 egg whites
1/2 t. cream of tartar
16 oz. powdered sugar
paste food coloring

Beat egg whites at room temperature and cream of tartar in large mixing bowl at medium speed until foamy. Gradually add sugar, mixing well. Beat for 5 to 7 minutes. Tint as desired. Keep icing covered at all times with plastic wrap. Add food coloring as desired.