Combine the sweetened condensed milk and pudding mix with the cold water at least 4 hours before making the pudding or overnight. Refrigerate.
Right before making the pudding, cut up the bananas and toss them with some lemon juice.
Whip the whipping cream until stiff peaks form and combine with the cold pudding mixture.
Begin with a layer of vanilla wafers and bananas in your 9×13 pan; top with a layer of pudding and repeat.
You can top with cool whip designs or just leave the top layer plain like the bakery does!
Refrigerate a couple of hours and enjoy!