Napfkuchen(Turban Cake)  
["1/2 c. butter", "1 Tbsp. lemon peel", "1 tsp. vanilla extract", "1 c. sugar, divided in half", "4 eggs, separated", "3/4 c. milk", "2 c. sifted flour", "2 1/4 tsp. baking powder"]
["Cream together butter, lemon peel, vanilla, 1/2 cup sugar and egg yolks.", "Add milk slowly.", "Beat egg whites until stiff.", "Add 1/2 cup sugar.", "Add flour and baking powder to creamed mixture.", "Fold in stiffly beaten egg whites.", "Turn batter into mold.", "Bake about 55 minutes at 350\u00b0.", "For variety, add 1/2 cup freshly ground poppy seeds or 1/2 cup rum soaked raisins."]
["butter", "lemon peel", "vanilla extract", "sugar", "eggs", "milk", "flour", "baking powder"]