Using a food processor, in batches, pulse the oreos until fine, like a crumb.

In a mixing bowl, mix together the oreo crumbs with butter, stir to combined.

Place oreo mixture into the bottom of a pre-greased 9x13 baking dish. Using your hands or the back of a measuring cup, back the crumbs down so they hold together. Place in the refrigerator.

Next, using a large bowl, mix the cream cheese until smooth. Add in half the powdered sugar, mix until well combined and then add in the remaining powdered sugar, mixing until fully incorporated.

Add 1 of the cool whip tubs and fold in with a spatula until mixed thoroughly. Place on top of the oreo mixture in an even layer and place back into the refrigerator.

To 3 cups of milk, add in the chocolate pudding, stirring until smooth. Allow to thicken for 3-5 minutes before pouring ontop of the cream cheese mixture. Spread into an even layer.

Place the second tub of cool whip onto the chocolate pudding layer.

If desired, top with oreo crumbs.

Allow to set in the refrigerator for 4 hours or overnight!