Chop up 8 cookies....put aside. Crush rest of cookies, mix with butter, and press firmly in the bottom of a greased pan. Dollop marshmallow cream over crust within a 1/2 inch of edges. Sprinkle chips, nuts, and chopped cookies on top, pressing lightly into marshmallow cream. Bake at 350 degrees for 15 minutes until marshmallow cream puffs slightly. Cook completely and cut into squares or triangles.