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
Tripe also refers to culinary dishes produced from any animal with a stomach. In some cases, other names have been applied to the 'tripe' of other animals. For example, tripe from pigs may be referred to as paunch, or hog maw. Washed tripe is more typically known as dressed tripe. To dress the tripe, the stomachs are cleaned and the fat trimmed off. It is then boiled and bleached, giving it the white color more commonly associated with tripe as seen on market stalls and in butchers shops. The task of dressing the tripe is usually carried out by a professional