Preheat the oven to 350°F and line a baking sheet with parchment paper.
Blitz the oats in a blender until you have a fine flour, or, alternatively, use oat flour instead. Set aside.
In a large mixing bowl, smash the peanut butter and ripe banana. And the oat flour and smash with a fork until the dough is thick and well combined. If it’s crumbly, add 2-4 Tablespoons more peanut butter and recombine. You want the dough to be firm, sticky, and pliable
Roll dough into a thin slab, about ~¼ inch thick, and cut into shapes with a cookie cookie. Alternatively, you can roll them into ~1 Tablespoon balls and flatten with your hands for a simple circular cookie.
Bake for ~15 minutes until lightly brown underneath. Allow to cool for 10-15 minutes before sampling or sharing with your pup!
Store in an airtight container in the fridge for up to 2 weeks!