No Bake Peanut Butter Chocolate Dessert

20 Oreo's, divided
2 T melted butter
1 8 oz. pkg cream cheese, softened
1/2 c. peanut butter
1 1/2 c. powdered sugar
1 carton frozen whipped topping, thawed
15 mini peanut butter cups, chopped
1 c. cold milk
1 pkg fudge pudding

Crush Oreo's in big baggie. Set aside some to top with and mix the rest with the melted butter. Push crushed Oreo's in bottom of 9 x 13 pan. Beat together cream cheese, peanut butter, and 1 c. powdered sugar. Fold in half of whipped topping. Spread peanut butter mixture over Oreo's.  Sprinkle peanut butter cups on top. In another bowl,  whisk together milk, pudding mix, and remaining powdered sugar in bowl until set, about 3-4 minutes. Fold in rest of whipped topping. Spread over peanut butter cups. Top with Oreo's.