Out Of This World Frosting
["3/4 c. milk", "1 c. white sugar", "1 stick margarine", "1/2 c. shortening", "pinch of salt", "2 tsp. vanilla"]
["Bring milk to a boil; set aside.", "Cream sugar, shortening and margarine at high speed; add salt after mixture is creamy.", "Add cool milk, small portions at a time.", "Add vanilla and beat until all sugar disappears when touching it between thumb and finger."]
["milk", "white sugar", "margarine", "shortening", "salt", "vanilla"]