Frankie Rouse'S 7-Minute Icing
["2 egg whites", "1 1/2 c. sugar", "1 1/2 tsp. white corn syrup", "5 Tbsp. water", "1/8 tsp. salt", "1 1/2 tsp. vanilla", "3 marshmallows, cut up"]
["Place all ingredients except marshmallows and vanilla in top of double boiler over boiling water and beat with a rotary beater 7 minutes or until mixture holds a peak.", "Remove from heat.", "Add vanilla and marshmallows.", "Continue to beat until well blended and apply to cake."]
["egg whites", "sugar", "white corn syrup", "water", "salt", "vanilla", "marshmallows"]