Oven: Preheat the oven to 350°F (180°C) and line a baking sheet with parchment paper.
Bananas: Peel the bananas. Add them to a bowl and mash them with a fork or a potato masher, or blend them with an immersion blender.
Combine: In a bowl, combine the mashed bananas, rolled oats, and chocolate chips.
Shape: Place little heaps of batter on the baking sheet using two tablespoons (or a small cookie scoop). Gently press them into thick disks with your fingers.