Preheat: Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
Combine Ingredients: In a mixing bowl, mash the banana well. Add the applesauce, rolled oats, and melted coconut oil. Stir until well combined.
Add Spice (Optional): If desired, add a pinch of cinnamon or nutmeg for flavor.
Drop by Spoonfuls: Drop small spoonfuls of the mixture onto the prepared baking sheet.
Bake: Bake for 12-15 minutes, or until the edges are lightly golden brown.
Cool: Let the cookies cool completely on the baking sheet before serving.