Potato Chocolate Cake - cooking recipe

Ingredients

3/4 cup butter or margarine, softened
2 cups sugar
4 eggs, separated
1 cup mashed potatoes
1/2 cup water
1 tsp. vanilla extract
2 cups all-purpose flour
3 Tbsp. baking cocoa
2 tsp. baking powder
1 cup chopped nuts
1 (16 oz.) can chocolate frosting

Preparation

In a large mixing bowl, cream the butter and sugar.
Add the egg yolks, potatoes, water and vanilla; mix well.
Combine the flour, cocoa and baking powder; add to the creamed mixture.
In a small mixing bowl, beat egg whites until stiff peaks form; fold into batter along with nuts.