Recipe courtesy of Jo Davison
Make brownies according to package directions. In a small bowl, combine 1 cup of crumbled graham cracker crumbs with 2 tbls of melted butter and sprinkle on top of brownies. In a double boiler melt package of chocolate and top the brownies and graham cracker crumbs. Add a layer of marshmallows and melt under a low broiler just until browned. Allow to cool before serving.