Preheat the Oven: Start by preheating your oven to 350°F (175°C) and line a baking sheet with parchment paper.
Mix Dry Ingredients: In a medium bowl, whisk together the flour, baking soda, cinnamon, and salt. This will ensure your cookies rise perfectly!
Cream the Butters and Sugars: In a separate bowl, beat together the softened butter, granulated sugar, and brown sugar until the mixture is light and fluffy.
Beat in Egg and Banana: Add the egg and vanilla extract to the butter mixture, followed by the mashed bananas. Mix until everything is well combined.
Combine the Mixtures: Gradually add the dry ingredients to the wet ingredients, stirring gently until just combined.
Add Oats and Mix-ins: Fold in the rolled oats, and if you’re feeling adventurous, add some walnuts or chocolate chips.
Scoop and Bake: Using a spoon or cookie scoop, drop spoonfuls of dough onto the prepared baking sheet, leaving enough space between each cookie.
Bake: Place the tray in the preheated oven and bake for 10-12 minutes or until the edges are lightly golden.
Cool: Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely.