Menudo (soup) hours, the tripe should be added along with salt, an onion cut in half, and one or two heads of garlic. Red menudo has the addition of Guajillo chili paste. The menudo is allowed to continue boiling for an additional three hours while covered. Once it is almost done, the hominy is added. There are a number of regional variations on menudo. In northern Mexico, typically hominy is added. In northwest states such as Sinaloa and Sonora usually only the "blanco," or white, variation is seen; "menudo blanco" is the same dish, with the difference that red pepper is not
Menudo (soup) is also usual to use only yellow hominy in menudo in the Texas region. A similar stew made with more easily cooked meat is pozole. Some variations of menudo substitute garbanzo beans instead of hominy. In the United States, since the mid-20th century, prepared menudo has been common in food stores and restaurants in cosmopolitan areas and in other areas with a significant Mexican population. Restaurants often feature it as a special on Saturday and Sunday, and the folklore belief that menudo will alleviate some of the symptoms of a hangover is widely held. An annual Menudo Festival is held