Great for if you already have stale peanut butter cookies to get rid of (or you can follow this recipe to make your own). Also if you don't have the time to do the homemade crust you can crush up Nutter Butter cookies, just making sure to remove the inside icing.
I got this idea from a restaurant that served something similar. The combination of banana cream filling, peanut butter cookies, and caramel is out of this world! This is good as a cool dessert on a hot summer day.