Cream together, butter, cream cheese and powdered sugar until real smooth. Add milk and pudding; cream together. Add whipped cream. To this you add your color last. In a plastic bag, crush the Oreos. Put a layer of Oreos in bottom of bowl. Add a layer of pudding mix 1/2 of pudding and another layer of Oreos. Add another layer of pudding mix, ending with Oreos on top. Sprinkle with halloween sprinkles or decoration of your choice.