To package Christmas cookies, start by choosing a festive box or container that is large enough to fit all of the cookies. Place a layer of tissue paper on the bottom of the box, then arrange the cookies on top of the tissue paper. Add another layer of tissue paper over the cookies and seal the box. You can also tie a ribbon around the box for a more decorative look. For a finishing touch, add a small note or card that says "Happy Holidays" or "Enjoy Your Treats!"