The Buddha's doctrine of ahimsa (non-violence) transformed Indian diet more than any other single influence. From an era of Vedic meat sacrifice to the vegetarian ideal that Ashoka the Great spread across an empire — Buddhism reshaped what India eats.
The Vedic tradition that preceded Buddhism (roughly 1500 BCE-500 BCE) included regular animal sacrifice — horses, cattle, and other animals killed in ritual context. Meat eating was part of the elite Brahmin tradition. When Siddhartha Gautama taught ahimsa (non-violence toward all living beings) in the 5th century BCE, and when Emperor Ashoka converted to Buddhism in the 3rd century BCE and spread its dietary principles across the Maurya Empire, the dietary landscape of India began its fundamental shift.
Emperor Ashoka (268-232 BCE) converted to Buddhism after the Battle of Kalinga and issued edicts throughout his empire restricting animal sacrifice and encouraging vegetarianism. His Rock Edicts describe a reduction in the number of animals killed for the royal kitchen (from hundreds daily to a handful) and prohibitions on certain animal killings. This is the first recorded instance of a state adopting food policy based on ethical principles rather than religious ritual. Ashoka's dietary edicts planted the seed of vegetarian philosophy that Brahmin and Jain traditions would later develop further.

The contemporary Buddhist food tradition in India is primarily associated with the Ladakhi, Tibetan, Arunachali, and Sikkimese communities in the high Himalayan zone — where Buddhist monasteries maintain the tradition of vegetarian community cooking. Tibetan Buddhist food (thukpa, momos, tsampa) has spread nationally through Tibetan refugee communities in Delhi, Dharamshala, and Mysore. The Buddhist monks' daily alms-round (in Theravada countries) has parallels in the Indian monastic tradition — the monks ate whatever was offered, without selecting or rejecting.