Plain Cake
["1 c. Crisco or other shortening", "2 sticks margarine", "2 1/2 c. sugar", "3 c. plain flour", "5 eggs, separated", "3 tsp. lemon flavor", "1 tsp. baking powder", "1 c. milk", "5 egg whites"]
["Beat egg whites in last.", "Pour in batter last.", "Bake at 350\u00b0."]
["other shortening", "margarine", "sugar", "flour", "eggs", "lemon flavor", "baking powder", "milk", "egg whites"]