How Do I Make Royal Icing?
To make royal icing, combine powdered sugar, meringue powder, and water in a mixing bowl. Beat on low speed until the mixture is smooth and the sugar has dissolved. Increase the speed to high and continue mixing until the icing forms stiff peaks. Add food coloring, if desired. Transfer the icing to a piping bag or use a spatula to spread it onto your desired item. Allow the icing to dry completely before decorating further.