In a mixing bowl, whisk together the condensed milk, water, and milk until well combined.
Add the vanilla pudding mix and whisk until smooth. Refrigerate for 5–10 minutes to set.
In a separate bowl, beat the heavy cream and vanilla extract until stiff peaks form.
Gently fold the whipped cream into the pudding mixture until fully combined.
In a serving dish or container, start layering:
Begin with Nilla Wafers,
Add a layer of sliced bananas,
Spoon over a layer of the pudding mixture.
Repeat the layers until the container is filled.
Top with more Nilla Wafers, crushed wafers, and extra banana slices for garnish.
Chill in the refrigerator for at least 2–3 hours before serving.
Enjoy!