Outstanding Royal Icing

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Butler Estate in Irving, Texas in 1988.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 5 tablespoons meringue powder combined with ½ cup water
 * 2 egg whites at room temperature
 * ½ teaspoon cream of tartar
 * 2 teaspoons water
 * 1 pound confectioners' sugar

Directions

 * 1) Place all the ingredients in the bowl of an electric mixer and beat slowly until they are blended then beat at medium speed until icing forms stiff peaks.
 * 2) Add more sugar if icing is not stiff enough or a few drops of water if it is too stiff.
 * 3) Use immediately.