These cookies stay fresh for 2-3 days at room temperature in an air-tight container. Another option is to make all and form all the cookie dough balls at once. Set some aside in an airtight container in the freezer. Bring them out to bake whenever you'd like. You can also store these cookies fully baked in an airtight container in your freezer for up to 3 months. Bring them from the freezer so they can warm up to room temperature.