These popular melt-in-the-mouth Greek cookies are served on festive occasions such as christenings, weddings and holiday celebrations. They're buttery-rich and can contain nuts or not, but are always rolled in confectioners' sugar after baking. Kourabiedes come in various forms from balls to ovals to S-shapes. At Christmastime, a clove inserted in the top symbolizes the rare spices brought to Christ by the Magi.