In a large mixing bowl, combine the rolled oats, peanut butter, maple syrup, and dark chocolate chips. Mix until well-blended and uniformly combined. This should take about 2-3 minutes.

Using a tablespoon, scoop out portions of the dough and roll them into small balls. Place each ball on a parchment-lined baking sheet and gently flatten them.

Transfer the baking sheet to the refrigerator and allow the cookies to chill for at least 30 minutes.

After chilling, serve your 4-Ingredient Crispy Chocolate Oat Cookies as an irresistible snack.