2/3 c. butter
4 (1 oz.) squares unsweetened chocolate
4 eggs
2 c. sugar
1 tsp. vanilla
1 1/2 c. sifted flour
1 tsp. baking powder
1 tsp. salt
1 c. walnuts, coarsely chopped, optional

Melt butter and chocolate together over low heat, stirring constantly; cool. Beat eggs until light, stir in sugar then chocolate mixture and vanilla. Sift together dry ingredients and add to chocolate mixture, mixing well. Stir in nuts. Spread in a greased 13 x 9 x 2 inch baking pan. Bake at 350 degrees for 30 minutes. Frost.

BUTTERCREAM FROSTING:

6 tbsp. butter (softened)
2 2/3 c. confectioners' sugar
Hershey's cocoa - 1/3 c. for light flavor, 1/2 c. for medium flavor, 3/4 c. dark flavor
1/3 c. milk
1 tsp. vanilla extract

In small mixer bowl cream butter. Add cocoa and confectioners' sugar alternately with milk, beat to spreading consistency. Blend in vanilla. Approximately 2 cups of frosting.