Morcilla is a type of blood sausage that is commonly found in Spanish cuisine. It is made by combining pork blood with rice or other grains, along with various spices and seasonings. The mixture is then stuffed into casings and cooked. Morcilla has a rich and earthy flavor, with a slightly sweet and savory taste. It is often used in dishes like stews, rice dishes, and as a filling for empanadas. Morcilla is a popular ingredient in traditional Spanish cuisine.