First, preheat the oven to 350 F. Line a baking sheet with parchment paper, or just grease it, and set aside.
In a large bowl, mash the ripe bananas with a fork until smooth. Stir the the peanut butter, egg, and vanilla extract.
Next, add the oats, cinnamon, and salt. Stir until fully combined. Mix in the chocolate chips.
Scoop the cookie "dough" into 10-12 even-sized balls and place on the parchment lined pan. Slightly smash the cookies down with a spoon before baking. Bake the cookies for about 12-16 minutes until slightly golden brown on the edges.
Let the cookies cool slightly before enjoying! Leftover cookies can be stored room temperature for up to 3 days, otherwise keep them in the fridge for about a week. These make the best meal prep!