Put oil or butter on a baking dish that measures 9 by 13 inches.
Spread the Rice Krispie mixture evenly in the pan. You can use a spatula or wax paper to spread and press down the mixture.
Allow the Rice Krispie layer to cool down and harden completely at room temperature.
In a bowl, mix the instant banana pudding powder with cold milk for 2 minutes until it thickens.
Carefully mix the cut bananas into the pudding.
Gather and relax (2 hours):
Once the Rice Krispie layer has hardened, evenly spread the banana pudding mixture on top.
Put a lid on the baking dish and place it in the refrigerator for at least 1 hour, or until the pudding layer becomes solid. For best results, let it cool for 2 hours.
Serve and have fun!
Cut the Banana Pudding Rice Krispie Treats into square pieces before serving.
If you want, add a small amount of whipped cream on top of each square before serving.
