¾ cup sugar
½ teaspoon cream of tartar
pinch of salt
2 egg whites
¼ cup cold water
½ teaspoon powdered instant coffee
2 teaspoons vanilla extract
Combine the first five ingredients in the top of a double boiler.
Set over simmering water on low heat.
Beat for 5-7 minutes, or til frosting stands in peaks.
Remove from hot water, add the instant coffee, and continue beating until it forms soft, billowy peaks.
Beat in the vanilla.
There will be enough to frost an 8 or 9 inch two layer cake or a 9-10 inch tube cake.