Per serving
Fluffy, light frosting adapted from Northern_Reflectionz No cook 7 minute frosting (http://www.food.com/recipe/no-cook-7-minute-frosting-107841)... Note that you do need to use fresh egg whites (not liquid egg whites).
Mix sugar, cream of tartar, vanilla, other flavoring, and egg whites.
Drizzle boiling water in as you mix.
Beat on high until mixture forms peaks (like meringue) approx 5-7 minutes.
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