Gather all ingredients.
Place milk and pudding mix in a large bowl; beat with a whisk for 2 minutes. Blend in condensed milk until smooth.
Stir in vanilla, then fold in whipped topping.
Layer wafers, banana slices, and pudding mixture in a glass serving bowl.
For best results, chill pudding in the refrigerator for at least an hour before serving. When ready to serve top with extra crushed wafers.
