Crepas de CuitlacocheCuitlacoche (also spelled huitlacoche) is a gray to black fungus (similar to a mushroom) that grows on corn in the rainy season. This ingredient dates back to Aztec cooking and is quite an exotic delicacy. Crepas de Cuitlacoche is a prized dish that's served as a separate course in many sophisticated restaurants. Look for canned cuitlacoche in Mexican markets or from mail-order sources.