Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.
Mash the bananas in a large bowl until smooth with some lumps.
Mix the peanut butter into the mashed bananas until creamy.
Add the oats and stir until a sticky dough forms. Add more oats or banana as needed to adjust texture.
Fold in chocolate chips or any other add-ins.
Scoop spoonfuls of dough onto the baking sheet and shape as desired (cookies won’t spread).
Bake for 12-15 minutes or until the edges are golden brown.
Let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.