Soto ayam is possibly the most popular variation of the traditional Indonesian soto soup. This chicken-based version usually includes compressed rice cakes such as lontong, nasi himpit or ketupat, vermicelli or noodles, while turmeric gives it a specific yellow color.
Other ingredients that may be used are onions and garlic, white or black pepper, ginger, cumin, lemongrass, coriander, and sometimes
koya, a mixed prawn cracker and fried garlic powder. It is commonly served topped with boiled eggs, fried potato slices, Chinese celery leaves, and fried shallots.
Sambal, a hot chili paste,
krupuk, deep-fried crackers, or
emping, traditional Indonesian chips may also be used as accompaniments to the dish.