1/3 c. butter
1 c. sugar
2 eggs
1 3/4 c. sifted cake flour
1 tsp. baking powder
1 tsp. baking soda
2 1/2 tbsp. cocoa
1 c. sour milk
1 tsp. vanilla

Cream butter and sugar until light and fluffy. Add eggs and mix well. Mix and sift dry ingredients and add alternately with milk and vanilla. Beating smooth after each addition. Pour into 3 greased and floured 8 inch layer pans. Bake in moderate oven (375 degrees) for 25 minutes. Turn out on cake racks to cool. Fill with maple cream filling. Frost with chocolate frosting.

MAPLE CREAM FILLING:

2 beaten egg yolks
1/2 c. sugar
1/2 tsp. Mapleine
3/4 c. milk
1/2 tsp. vanilla or rum flavoring
1 lb. chopped walnuts

Mix egg yolks and sugar; add milk and cook in top of double boiler until thick. Cool; add vanilla or rum and nuts. Spread between layers.