Sweetbread is the edible thymus or pancreas of a young animal, especially a calf, lamb, or kid. The salivary and lymphatic glands of various animals are also sometimes served as sweetbreads.
The thymus gland, also called throat sweetbread, is located in the base of the throat. It is relatively large in young animals but becomes smaller or disappears in the adults. The pancreas gland, also called stomach sweetbread, is a digestive organ near the stomach. It is usually considered finer than the thymus, which contains more tough connective tissue. Sweetbreads are white, soft, and fleshy. They are prepared in a variety of ways, including broiling, braising, and sauteing. Like other organ meats, sweetbreads are a good source of proteins and B vitamins.