My cookies typically use a lot of white flour, and substituting for other kinds of flour, especially coconut flour and almond flour, can produce a very dry cookie. (thepintertestkitchen.com)
I love crispy cookies but not dry cookies of you know what I mean. (auntpeaches.com)
By baking them twice, they lose any excess moisture, which ensures a crisp, dry cookie perfect for dipping. (reciperebuild.com)