01 -
In a large mixing bowl, whisk together the sweetened condensed milk, cold whole milk, and instant vanilla pudding mix for about 2 minutes until the mixture is smooth and starts to thicken. Refrigerate for 5–10 minutes to allow it to set slightly.
02 -
Gently fold half of the thawed whipped topping into the pudding base. Mix until smooth and creamy with no streaks remaining.
03 -
Arrange a layer of vanilla wafer cookies in the bottom of a 23 x 33 cm (9 x 13 inch) dish. Cover with an even layer of sliced bananas. Spoon over half the pudding mixture and spread evenly. Repeat the wafer, banana, and pudding layers. Finish by spreading the remaining whipped topping evenly over the top.
04 -
Cover the dish with plastic wrap or a lid. Refrigerate for at least 4 hours, ideally overnight, to let the flavors meld and the wafers soften.