7 Minute Icing
["3 egg whites", "2 c. sugar", "1/2 Tbsp. cream of tartar", "6 Tbsp. water", "6 large marshmallows", "1 Tbsp. vanilla flavoring or other flavoring, as desired"]
["Mix all ingredients in top of double boiler, place over boiling water and cook for 7 minutes, beating constantly with an electric mixer until it will hold a peak.", "Remove from heat; add vanilla and mix until it is the right consistency to spread on cake."]
["egg whites", "sugar", "cream of tartar", "water", "marshmallows", "vanilla flavoring"]