Peel and slash the bananas.
In a mixing bowl, combine the vanilla pudding mix, whole milk, and condensed milk.
Whisk well, until there are no visible lumps.
Optional — chill the bowl for a few minutes in the fridge.
In another bowl, combine the vanilla extract with heavy cream to make whipped cream.
Beat the mixture well for a minute or two, until it reaches the desired consistency.
Pour half of it into the pudding mixture, and set aside the other half to be used as topping for later.
Layer the bottom of your baking dish with Nilla Wafers.
Follow by creating a layer of sliced bananas on top.
Pour half of the pudding mix over the bananas.
Repeat the last two steps once more, and finish with another layer of Nilla Wafers.
Add some granulated sugar to the whipped cream. Mix well.
Pour the whipped cream on top of the Nilla Wafers.
Refrigerate for a few hours, or ideally, overnight.