Storage: To keep these cookies fresh, store them in an airtight container at room temperature for 3 to 4 days. You can also freeze the cookies for up to two months. To freeze, place the cookies in a single layer on a sheet pan and freeze until firm. Then, transfer the cookies to a freezer-safe container or zipper storage bag and store in the freezer. When you're ready to enjoy them, simply thaw at room temperature for a few hours.