Preheat the oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine rolled oats, peanut butter, honey, and unsweetened cocoa powder until a uniform dough forms.

Roll the dough into tablespoon-sized balls and place them on the baking sheet, flattening each ball slightly.

Bake for 12-15 minutes until crisp on the edges and soft in the center.

Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.