In a large bowl, mash the ripe bananas with a fork until smooth.
Add peanut butter, oats, non-dairy milk, vanilla, and cinnamon to the mashed bananas. Stir in optional nuts or raisins and chocolate chips until everything is well combined.
Using a cookie scoop, portion the batter onto a lined baking sheet. The cookies won’t spread much, so shape them as you prefer.
Refrigerate the shaped cookies on the baking sheet for 30 minutes to help them hold their form during baking.
Preheat your oven to 350°F (175°C). Bake the chilled cookies for 20 minutes.
Allow the cookies to cool on the baking sheet for a few minutes for easier handling.
Consider substituting the bananas with applesauce for a different base flavor or mix in different types of nuts and seeds for varied textures.
