Line an 8x8 square baking dish with parchment paper, and set aside.
In your food processor, add nilla wafers and pulse until the wafers are reduced to crumbs. Add brown sugar and melted butter, and mix well.
Pour the nilla wafer mixture into your baking dish and press down to form your crust. Place this in the freezer while you prepare your cheesecake.
To make the cheesecake, in a large mixing bowl, beat cream cheese for about a minute. Add the sugar and pudding mix to the bowl, and mix again until well combined.
Add cool whip, mix to combine. Slowly add milk, mixing between each addition. Pour cheesecake mixture over nilla wafer crust, and smooth out the top with a spatula.
Freeze cheesecake for about 4 hours.
Before serving, thaw for 1-2 hours in the refrigerator.
Top with whipped cream, Nilla wafers or crumbs and banana slices. Enjoy!