1 1/2 c. chopped walnuts
1 1/2 c. vanilla wafer crumbs
1 c. packed brown sugar
1 c. melted butter
1 pkg. (18.25 oz.) devils food cake mix w/pudding
1 1/2 c. whipped cream, chilled
1 tsp. vanilla
3 tbsp. granulated sugar

Preheat oven to 350 degrees. Mix walnuts, wafer crumbs, brown sugar and butter. Spread about 3/4 cup in each of 2 ungreased 9 inch round cake pans. Prepare cake mix as directed on package. Pour about 1 1/4 cups batter over walnut mixture in each pan; refrigerate remaining batter. Bake until top springs back when lightly touched, about 20 minutes. Immediately remove from pans; invert. Repeat with remaining batter and walnut mixture. Cool layers completely.