The rich and flavorful papaitan is a popular Filipino soup which consists of goat or cow innards such as heart, tripe, or liver, simmered alongside garlic, onions, and various spices. The most important addition to the dish is bile - a bitter liquid extracted from animal livers, giving the soup its distinctive sour flavor and a light yellow color.

This popular Ilocano dish is always served hot and is usually garnished with sliced green onions and chili peppers.