Preheat your oven to 350°F (175°C).

In a large mixing bowl, add the whole oats, chia seeds, flaxseed, and ground cinnamon. Stir until well combined.

In a separate bowl, mash a ripe banana until smooth, then stir in the maple syrup or honey.

Pour the wet mixture into the bowl with your dry ingredients. Gently fold them together.

Using a spoon or cookie scoop, portion out the dough onto a lined baking sheet, leaving space between each mound.

Bake for about 15 minutes until the edges turn golden brown and the centers look set.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack.