Miami Beach Birthday Cake
["1/2 c. graham cracker crumbs", "1/3 c. butter, melted", "1/2 c. walnuts, chopped", "2/3 c. semi-sweet chocolate chips", "1/2 c. butter, softened", "1 1/2 c. sugar", "1/3 c. semi-sweet chocolate chips, melted and cooled", "2 eggs", "1 tsp. vanilla", "2 c. flour, sifted", "1 tsp. salt", "1 tsp. baking soda", "1 1/4 c. buttermilk", "1 c. whipping cream, whipped and sweetened"]
["Combine graham cracker crumbs and melted butter; cool.", "Stir in nuts and 2/3 cup chocolate chips; set aside."]
["graham cracker crumbs", "butter", "walnuts", "semi-sweet chocolate chips", "butter", "sugar", "semi-sweet chocolate chips", "eggs", "vanilla", "flour", "salt", "baking soda", "buttermilk", "whipping cream"]