Preheat your oven to 325 degrees and line a cookie sheet with parchment paper or a silpat.
In a large bowl, whisk together the banana, peanut butter and coconut sugar until well combined.
Stir in the oats and stir until well combined. Finally, stir in the peanuts. Your dough will be a little bit wet and sticky - this is normal.
Use a cookie scoop to drop by heaping 1 Tbsp balls onto the prepared pan and use a fork to press them out about 1/2 inch thick, making sure to pack the edges together so the cookies hold their shape.
Bake until the edges are golden brown and the top feels set and springy - about 25-30 minutes. Let cool on the pan completely.
Drizzle with peanut butter, if desired, and DEVOUR!