Walnut Cake - Nußkuchen

1/2 cup butter, softened
1/2 cup mazola oil
2 cups sugar
5 eggs, separated
1 cup buttermilk
1 teaspoon baking soda
2 cups all purpose flour, sifted
1 teaspoon vanilla extract
1-1/2 cups chopped black walnuts
6-ounce package of frozen coconut, thawed
1/2 teaspoon cream of tartar

Cream Cheese Frosting
1/2 cup butter, melted
8-ounce package cream cheese, softened
1 box powdered sugar, sifted
1 teaspoon vanilla extract

Cream butter and oil. Add sugar and beat well. Add egg yolks and beat well. Mix buttermilk and soda. Stir until soda dissolves. Add four to mixture alternating with buttermilk. Stir in vanilla, add walnuts and coconut and stir well.

Beat egg whites with cream of tartar until stiff peaks form. Fold egg whites into batter. Pour batter into 3 greased, wax paper lined 9-inch round pans. Bake at 350 degrees for 30 minutes or until done. Cool in pans for 10 minutes and turn out.

Cream Cheese Frosting: Melt butter, mash up cream cheese. Add oleo to cream cheese and mix. Add powdered sugar and vanilla. Mix well. Spread on layers and top of the cake.