Crush the cookies until fine by using a food processor or by putting them in batches in a plastic bag and using a rolling pin to crush. Set aside approximate 3 tablespoons of the crushed cookies to use as a topping later. Melt the butter and combine with the Oreo pieces. Press in a 9 X 13 cake pan. Refrigerate while preparing the next layer.

Combine softened cream cheese, sugar, milk, and vanilla extract. Fold in cool whip and spread this over the cookie crust. Place back in the refrigerator and continue with the next layer.

Whisk together the chocolate pudding mix and the milk until it starts to thicken. Spread this over the cream cheese layer and return to the refrigerator for approximately 10 minutes.