Groom's Cake 

1 cup butter or margarine,softened
2 cups sugar
1 tsp. baking soda
5 eggs
1 cup buttermilk
2 1/4 cups cake flour
3 oz. unsweetened chocolate, melted
1 tsp. vanilla
Special chocolate frosting                                                                                                                                     

Cream butter; gradually add sugar beating well. Add eggs,one at a time, beating well after each addition. Dissolve soda in buttermilk; add to creamed mixture alternately with flour. Mix well after each addition. Add chocolate, mix well. Add vanilla. Pour into greased and floured 10 inch tube pan. Bake at 350 f. For 1 hour or until cake tests done. Cool in pan 10 to 15 minutes, remove from pan and cool completely. Frost with Special Chocolate Frosting (below).

Special Chocolate Frosting

1/2 cup butter or margarine, softened
1 egg yolk
1 cup cocoa 
1/4 cup milk
4 1/2 cups powdered sugar, sifted
1 tsp. vanilla

Cream butter, add egg yolk and cocoa, beating well. Add sugar alternately with milk, beating until smooth enough to spread. Stir in vanilla.