Store cooled cookies in an airtight container at room temperature for 3 days or refrigerate them for up to 5 days. For freezing, wrap groups tightly and place them in a freezer-safe container for up to 2 months. To refresh them, warm cookies at 275 F for 3 to 4 minutes and cool for 2 minutes before eating. Discard any cookies with an off smell, unusual moisture or visible mold.