Never Fail "Boiled Icing"
["1 c. sugar", "1/3 c. water", "1 tsp. vinegar", "2 egg whites", "3/4 tsp. vanilla extract"]
["Boil together sugar, water and vinegar to 238\u00b0, or until syrup spins a long thread when dropped from spoon.", "Beat egg whites stiff.", "Gradually add syrup beating constantly until frosting holds shape.", "Add vanilla.", "Makes enough for 2 layers."]
["sugar", "water", "vinegar", "egg whites", "vanilla extract"]