Potato Cake With Peanut Butter Frosting
["2 c. sugar", "1 c. shortening", "1 c. mashed potatoes", "4 eggs, separated", "2 c. all-purpose flour", "3 Tbsp. cocoa", "2 tsp. baking powder", "1 tsp. cinnamon", "1/2 tsp. nutmeg", "3/4 c. milk"]
["Cream sugar and shortening in mixing bowl.", "Stir in potatoes, then egg yolks.", "Sift in flour, cocoa, baking powder, cinnamon and nutmeg; add milk.", "Without prior beating, beat in egg whites. Continue beating well for at least 5 minutes or until batter is smooth.", "Grease 3 (9-inch) layer pans.", "Turn mixture evenly into 3 pans and bake in preheated 350\u00b0 oven for 20 minutes or until done. While cakes are cooling on wire rack, make Peanut Butter Frosting."]
["sugar", "shortening", "potatoes", "eggs", "flour", "cocoa", "baking powder", "cinnamon", "nutmeg", "milk"]