Oreo Cake
["1 (15 oz.) pkg. Oreos", "1 stick margarine, melted", "1 (8 oz.) pkg. cream cheese", "1 c. powdered sugar", "1 large carton Cool Whip, divided", "1 large pkg. instant chocolate pudding mix", "2 1/2 c. milk"]
["Crush cookies until coarse.", "Reserve 1/4 cup for topping.", "To the rest of the cookie crumbs, add the melted butter; mix well. Press into a 9 x 13-inch pan."]
["Oreos", "margarine", "cream cheese", "powdered sugar", "instant chocolate pudding mix", "milk"]