The easiest and best way to fix your sugar cookie is to add enough liquid ingredients to fix the issue. But what type of extra ingredients can you use?
Try adding a little bit of warm water to your dried out cookie dough. The water won’t change the flavor of your original recipe, but the extra liquid may help your dough stick together.
Adding butter to the cookie dough will give them a richer flavor, however, you don’t want to add too much fat or your cookies may turn out flat and greasy.