01 - Preheat oven to 350°F. Line a large baking sheet with parchment paper and set aside.
02 - In a large mixing bowl, mash the ripe bananas with a fork or potato masher until smooth and no large lumps remain. Whisk in the melted coconut oil, honey or maple syrup, egg, and vanilla extract until the mixture is fully combined and creamy.
03 - In a separate medium bowl, stir together the rolled oats, flour, baking soda, ground cinnamon, and salt until evenly distributed.
04 - Gently fold the dry ingredient mixture into the wet banana mixture using a spatula, stirring until just combined. Be careful not to overmix. Fold in the chocolate chips or raisins and chopped nuts if using.
05 - Drop heaping tablespoons of dough onto the prepared baking sheet, spacing each mound about 2 inches apart to allow for spreading. Slightly flatten each portion with the back of a spoon or your fingers.
06 - Bake on the center rack for 13 to 15 minutes, or until the cookies are set and the edges are lightly golden brown.
07 - Let the cookies rest on the baking sheet for 5 minutes, then carefully transfer them to a wire cooling rack to cool completely before serving or storing.