Leftover or partially eaten food (Uchchhishta) is recommended to be offered to Matangi with the devotee in the polluted Uchchhishta state, that is, having eaten but not washed, with the remains of food in the mouth and hands. An offering of leftovers to Hindu deities or being in the polluted Uchchhishta state is a taboo in mainstream Hinduism. Another taboo that is broken in Matangi worship is the offering to the goddess of a cloth stained with menstrual blood to gain the ability to attract a mate. Menstrual blood is considered polluted in almost all Hindu scriptures and menstruating women are kept away from Hindu worship and temples.
The outcaste Matangi community of Nepal collect polluted substances and items related to death and bad luck such as sacrificial animal heads and clothes of the deceased, and offers them at special stones kept at crossroads called chwasas, where the Matangi "consumes" them as an offering, thereby getting rid of the pollution. The Tantrasara also advises offerings to Matangi of meat, fish, cooked rice, milk and incense at crossroads or cremations grounds in the dead of the night to overpower enemies and gain poetic talent. Oblations of Uchchhishta, cat meat and goat meat to the goddess are said to help achieve Supreme knowledge. A text proclaims Matangi's worship becomes fruitful only if the devotee reveres women as goddesses and refrains from criticizing them.
No fasts or rituals to purify oneself before worship—typical of Hindu worship—are prescribed for Matangi worship. Anyone can use any mantra for worship, even though he is not initiated or considered unfit for worshipping any other deity. A thousand-name hymn from the Nanayavarta-tantra and a hundred-name hymn from the Rudrayamala are dedicated to the goddess. The recitation of the Sanskrit alphabet, the chanting of mantras, the loud reading of the scriptures, and performance of music and dance are also described as constituting acts of her worship.