Oreo Cookie Cake

1. 1 1/4 pkg. Oreo Cookies
2. 1 Stick Butter
3. 2 8 oz. pkgs. Cream Cheese
4. 2 8 oz. Containers Cool Whip
5. 2 Cups Confectionery Sugar
6. 1 Large Box Chocolate Pudding

Crush Oreo Cookies real fine, put in 13x9 Dish. Melt butter, pour over top cookies, press and refrig. for 15 minutes. Mix cream cheese, 1 cool whip and sugar. Spread over cookies, place in refrig. for 30 minutes. Cook pudding and let cool, then spread over cream cheese mixture and put in refrig. for 15 more minutes and then spread other container of cool whip over pudding. Optional: Save 1/2 cup cookie crumbs to sprinkle over top.