Ola'S Irish Potato Cake
["2 c. sugar", "2/3 c. butter", "1 c. warm mashed potatoes", "1 oz. unsweetened chocolate", "2 c. flour", "2 tsp. baking powder", "1/2 tsp. salt", "1/2 c. buttermilk", "1 c. chopped walnuts", "1 tsp. cloves", "1 tsp. cinnamon", "1 tsp. nutmeg", "1 tsp. vanilla", "4 eggs, separated"]
["Mix together sugar and butter.", "Stir in chocolate and mashed potatoes.", "Mix in flour, baking powder and salt.", "Stir in buttermilk, walnuts, spices and vanilla.", "Beat egg whites and fold into mixture.", "Pour mixture into baking pan and bake at 350\u00b0 for 35 to 40 minutes.", "Let cool.", "Serves 8 to 10."]
["sugar", "butter", "warm mashed potatoes", "unsweetened chocolate", "flour", "baking powder", "salt", "buttermilk", "walnuts", "cloves", "cinnamon", "nutmeg", "vanilla", "eggs"]