TOPPING:

1/2 c. graham cracker crumbs
1/3 c. butter, melted
1/2 c. chopped walnuts
2/3 c. chocolate chips

Combine ingredients and set aside.

CAKE:

2 c. sifted flour
1 tsp. baking soda
1 tsp. salt
1/2 c. butter
1 tsp. vanilla
1 1/2 c. sugar
2 eggs
1/3 c. chocolate chips, melted
1 1/4 c. buttermilk

Cream butter gradually adding sugar, eggs and vanilla. Alternately add flour mixture and milk, beginning and ending with dry ingredients. Bake in two 9-inch pans, sprinkle with topping first. Bake at 375 degrees for 30-40 minutes.