In a large mixing bowl, combine the rolled oats, chocolate chips, nut butter, and honey or maple syrup. Stir the mixture gently with a spatula until well incorporated, forming a sticky dough-like consistency.

Using a tablespoon, scoop out portions of the cookie mixture and drop them onto a baking sheet lined with parchment paper. Flatten each scoop slightly with the back of the spoon or your fingers.

Place the baking sheet with formed cookies into the refrigerator and chill for at least 30 minutes.

After chilling, remove the cookies from the fridge and serve immediately or let sit out for a few minutes.