Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large bowl, mash the ripe bananas until smooth.
2 banana
Add the rolled oats, natural peanut butter, and cinnamon to the mashed bananas. Mix until well combined.
1 cup rolled oats, 1/4 cup peanut butter, 1/2 teaspoon cinnamon
If using, fold in the dark chocolate chips.
1/4 cup dark chocolate chips
Scoop spoonfuls of the dough onto the prepared baking sheet, flattening them slightly with the back of the spoon.
Bake in the preheated oven for 10-15 minutes, or until the edges are lightly golden.
Allow the cookies to cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.