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

In a large mixing bowl, combine mashed bananas, peanut butter, maple syrup, and vanilla extract until smooth.

Incorporate the rolled oats, cinnamon, and salt into the wet mixture until fully combined.

Fold in the dark chocolate chips evenly.

Divide the dough into 12 equal portions and place them on the prepared baking sheet.

Flatten each portion slightly into a cookie shape as they will not spread during the baking process.

Bake for 12 minutes or until the cookies are firm to the touch.

Remove from the oven and allow to cool on the baking sheet for 5 minutes before serving.