Hueso de Anillo is a Mexican cut of beef that translates to “ring bone” in English. It typically comes from the shank or lower leg of the cow and includes a circular bone surrounded by meat. This cut is rich in connective tissue and often contains marrow inside the bone, making it ideal for slow-cooking methods such as stews, soups, or broths (like caldo de res). The long cooking time breaks down the collagen, resulting in tender meat and a flavorful dish.