Mahlab (Mahleb or Mahalepi) is an unusual fragrant spice made from the stones of a species of a black cherry called Prunus Mahaleb, or more commonly know, St. Lucies Cherry. Mahlab, has been used for centuries in the Middle East (especially in Turkey and Syria) as a sweet/sour, nutty addition to breads, cookies and biscuits. This old spice has gained an American following with the new interest in Mediterranean cooking and is mentioned in several popular new cookbooks.