Preheat oven to 350° Fahrenheit and line a large baking sheet with parchment paper.
Mix together the rolled oats, oat flour, and baking powder in a large bowl.
Add in the melted coconut oil, maple syrup, and egg then mix together until fully combined.
Mix the chocolate chips into the cookie dough (if using), then scoop the cookies out onto your prepared baking sheet.
Bake for 8-10 minutes, or until the outside edges of the cookies are lightly golden brown. Let the cookies cool on the baking sheet for 5 minutes before transferring to a wire cooling rack to cool completely before storing or serving.