Butterhead Lettuce receives its name from the sweet buttery flavor and delicate texture of the large, ruffled outer leaves. Cutting into the lettuce reveals a soft, folded, and blanched heart sometimes called cabbage or round
lettuce. These popular lettuce are tender and mild, with the sweeter leaves at the center. Butter lettuce is low in sodium, a good source of vitamin A, and has small amounts of iron and calcium.