Scratch 3-Layer Cake With Caramel Icing
["3 c. flour", "3 c. sugar", "3 sticks butter", "3 tsp. vanilla", "1 c. 7-Up", "5 eggs, separated"]
["Whip butter until smooth, then alternate adding flour, sugar and egg yolks.", "When flour, sugar and egg yolks have been added, put in 7-Up and then vanilla.", "Add egg whites until desired smoothness.", "When batter is finished, put in 3 cake pans and cook at 350\u00b0 until done."]
["flour", "sugar", "butter", "vanilla", "eggs"]