Oncom /ɒnˈtʃɒm/ is one of the traditional staple foods of West Javan (Sundanese) cuisine, Indonesia. There are two kinds of oncom: red oncom and black oncom. Oncom is closely related to tempeh; both are foods fermented using mold. Red oncom reduces the cholesterol levels of rats, suggesting similar effects in humans. Black oncom is made by using Rhizopus oligosporus while red oncom is made by using Neurospora intermedia var. oncomensis. It is the only human food produced from Neurospora.