Although Mexican Birria is often associated with the state of Jailsco, the dish is enjoyed in many parts of Mexico. Birria is a traditional Mexican dish made with goat meat or mutton. However, other meats such as beef, veal, or pork can also be used. Birria is served as a stew or used as a taco filling and can most often be seen on the menu for weddings, baptisms, holidays, and other celebrations. Widely touted as a hangover cure, Mexican Birria is also frequently seen on brunch menus the day after celebrations.Birria is often sold at Mexican street stands or small mom-and-pop cafes. Many people combine more than one meat in the same dish. You do need to plan ahead when making this Mexican Birria recipe, as the meat must marinate overnight for the best results.