Hayagriva is said to be one of the avatars of Lord Vishnu with human body and horse head, brilliant white colour, white garments seated on white lotus. As per mythology, Madhu-Kaitabha stole vedas from Brahma and Vishnu took Hayagriva avatar to recover the same.
A great devotee named Sri Vadirajathirtha of Udupi Sri Krishna Mutt used to offer cooked Bengal gram as prasadam to Lord Hayagreeva. He used to recite Hayagriva Sloka and keep the offering on his head. Lord Hayagriva would come as a beautiful horse form and eat the prasadam. The prasadam is also called as Maddi-Hayagriva Maddi. Even today Hayagriva/Hayagriva Maddi is offered as prasadam to the devotees at Sri Sode Vadiraja Mutt.
Hayagreeva/Hayagriva Maddi is a sweet dish prepared from chana dal and jaggery. It is very easy to prepare. It is also prepared as prasadam on festivals like Varamahalakshmi Vrat and also Sri Guru Raghavendra Swamy Aradhana Mahotsav.