If you're going to eat them the same day you've made them, you can loosely cover them on a counter at room temperature. But if you're not going to be enjoying them until the next day, the best way to store them is in a loosely covered container between payers of wax paper or parchment paper in the refrigerator. Even better, line the bottom of that container with a couple paper towels to help absorb any of the "sweating" that might occur.