Line an 8x8" dish with aluminum foil.
Crush oreos in a food processor.
Add melted butter and process until blended.
Press into bottom of prepared pan and refrigerate for 30 minutes.
Beat together cream cheese and sugar until well blended.
Spread over prepared crust.
In another bowl combine pudding mix and milk and beat for 3 minutes until barely thickened.
Spread over the cream cheese layer.
Refrigerate until pudding is set.
Remove from pan by lifting foil.
Cut into bars.
Spread whipped topping over bars.