In a spacious mixing bowl, combine the rolled oats, peanut butter, maple syrup, and cocoa powder. Use a sturdy spatula to vigorously mix the ingredients until you achieve a smooth, well-blended texture, about 2-3 minutes.

Transfer the blended mixture into the refrigerator and chill for about 15 to 30 minutes.

Once the dough is sufficiently chilled, scoop out tablespoon-sized portions, roll into balls, and place on a baking sheet lined with parchment paper.

Flatten each ball gently to form a cookie shape and ensure there is space between them for even baking.

Place the baking sheet in your preheated oven at 350°F (175°C) and bake for 10 to 12 minutes.

Let the cookies cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.