Place one layer of Oreos in the bottom of a 9x13-inch dish. You may have to cut Oreos in half so they fit well.
In a large mixing bowl, beat lemon pudding mix and milk until thickened.
Add lemon zest and half of whipped topping. Stir until combined.
Spread half of the lemon mixture over top of Oreos.
Add another layer of Oreos.
Spread remaining lemon mixture over Oreos.
Add another layer of Oreos.
Spread remaining whipped topping over Oreos.
Cover with plastic wrap and chill in the refrigerator for at least 4 hours.
