Step 1

In the bowl of an electric mixer, blend sweetened condensed milk and cold water until combined. Add pudding mix and blend on medium speed about 2 minutes. Transfer mixture to a small bowl, cover and refrigerate for at least 4 hours (or overnight).

Step 2

After the pudding mixture has chilled and is very firm (at least 4 hours), beat cold whipping cream in the bowl of an electric mixer until the cream is fluffy and holds a stiff peak. Then, use a spatula to gently fold the pudding mixture into the whipped cream (add the pudding to the whipped cream in two batches). Fold/stir just until the pudding is combined. Fill (2/3 full) a large piping bag or a large ziplock bag with the whipped pudding (then snip off one corner of the bag).

Step 3

Pour about 1/2 of the box of Nilla Wafers into a large bowl and break up each cookie in half or into a couple pieces.

Step 4

Slice bananas, reserving a 1/2 of a banana (in the peel) to slice and add just before serving.

Step 5

Begin assembly by adding a few broken cookies, a few slices of banana, and a layer of the pudding. Repeat with cookies, banana and pudding. Add a third layer if possible (depending on your dishes). Chill assembled desserts at least 30 minutes or up to 6 hours. Shortly before serving, add a garnish of a few broken cookies and a slice of banana.