Place the pudding mix and the milk into a large bowl, using a whisk whip it for 2 minutes. Place it in the fridge for 5 minutes to set.
While the pudding sets, open the bags of nilla wafers and roll down the sides.
This is easier if you have a tray or baking dish with high sides so you can sit them up while filling. It's also a great way to serve them to your hungry crowd!
Evenly distribute the pudding, whipped cream, and sliced bananas among the bags and serve.
Video
Notes
You can use the nilla wafer that are sold in containers (instead of bags) for a sturdier hold.
Snack pack pudding can be used instead of boxed pudding.
I like to add a few more nilla wafers and banana slices on top for presentation.
You can make your own homemade whipped cream for this (see my notes above) or you can use Cool Whip or Reddi-Wip as well.
If you want to make your own homemade pudding you can do that as well. We love using this Homemade Banana Pudding recipe.
You may need more than one banana if yours are on the small side.