Preheat oven to 350 and grease a rectangular baking dish with cooking spray.

Prepare cookie dough as directed on the package and press evenly into the bottom of the baking dish with your fingers or the back of a spoon. Bake for 18-22 minutes or until center is set. Cool completely.

Beat cream cheese, powdered sugar and vanilla together until smooth. Spread on top of the cookie layer. Refrigerate.

Mix pudding and milk together with a wire whisk. Spoon onto the top of the cream cheese layer and return to the refrigerator. Let set, for at least an our, or overnight. Top with whipped topping before serving.