Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

Pour the rolled oats into a food processor and pulse until they form a coarse flour consistency with some texture remaining, not a fine powder.

In a large mixing bowl, thoroughly mash the ripe banana until smooth. Add the peanut butter and mix until completely combined.

Gradually add the oat flour to your banana-peanut butter mixture. Stir with a wooden spoon until a thick, moldable dough forms. If too wet, add a tablespoon more ground oats.

Roll the dough into small balls about the size of a walnut, then flatten them slightly on your prepared baking sheet. Space them about an inch apart.

Bake for 12-15 minutes until the edges are lightly golden and the treats feel firm to touch. Let them cool completely on the baking sheet before serving.