Preheat your oven to 350°F (175°C). This ensures that your cookies bake evenly and come out perfectly chewy.
In a large mixing bowl, mash the 3 ripe bananas using a fork or potato masher until smooth. Make sure there are no large chunks left.
Add the ½ cup of creamy peanut butter to the mashed bananas. Stir well until the mixture is combined and creamy.
Next, sift in ½ cup of cocoa powder, a pinch of sea salt, and the ground cinnamon if you’re using it. Mix everything together until you have a thick, dough-like consistency.
Using a spoon or a cookie scoop, portion out the dough onto the prepared baking sheet. Leave some space between each cookie, as they will spread slightly while baking.
Place the baking sheet in the preheated oven and bake for about 10-12 minutes. The cookies should look set and slightly puffed.
Once baked, remove the cookies from the oven and let them cool on the baking sheet for a few minutes before transferring them to a wire rack. Enjoy them warm or at room temperature!
