In a large mixing bowl, combine oats and cocoa powder. Stir thoroughly until well blended.

In a separate bowl, mix together peanut butter and maple syrup until smooth and creamy.

Pour the wet ingredient mixture into the dry ingredients bowl. Stir well until a cohesive dough forms.

Using your hands, scoop out tablespoon-sized portions of dough and roll them into balls. Place on a baking sheet lined with parchment paper.

Gently flatten each ball with your palm to about 1/2 inch thickness.

Preheat your oven to 350°F (175°C) and bake for 10-12 minutes, until set around the edges.

Allow the cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.