Gluten Free Option: If you would like to make these gluten free, then substitute gluten free flour for the regular flour. And also make sure to get gluten free oats. Even though oats are naturally gluten free, it's best to check the package. I tested this recipe with gluten free flour and the cookies come out a little bit crispy but still taste great. You might have to press down the cookies with the bottom of a glass when they come out of the oven to make them more flat.