Black Walnut Cake - cooking recipe

Ingredients

1/2 c. butter or margarine, softened
1/2 c. shortening
2 c. sugar
5 eggs, separated
1 c. buttermilk
1 tsp. baking soda
2 c. all-purpose flour
1 tsp. vanilla extract
1 c. chopped black walnuts
1 (3 oz.) can flaked coconut
1/2 tsp. cream of tartar

Preparation

Cream butter and shortening.
Gradually add sugar, beating well at medium speed.
Add egg yolks, one at a time, beating well after each addition.