1-2-3-4 Cake
["1 c. butter", "4 eggs, separated", "3 tsp. baking powder", "1 1/4 c. milk", "2 c. sugar", "3 c. flour", "salt"]
["Mix butter and sugar.", "Add egg yolks; beat.", "Add flour, baking powder and salt, alternating with milk.", "Fold in egg whites which have been beaten until stiff.", "Bake in greased tube pan at 350\u00b0 for 1 hour."]
["butter", "eggs", "baking powder", "milk", "sugar", "flour", "salt"]