A morello cherry is a type of tart cherry known for its dark red color, sour flavor, and dark-colored juice, which is different from the light-colored juice of sweet cherries. Because of their intense flavor, morello cherries are rarely eaten fresh and are instead used for cooking, preserving, and making juices, jams, and baked goods. Some varieties of morello cherries are classified as 'teinturiers' because they have red flesh, not white.