Lassi (pronounced [ləsːi]) is a Punjabi yogurt–based beverage with a smoothie-like consistency. It has been called "the most popular and traditional yogurt-based drink" in India. It has also been described as the form in which yogurt "is most cherished and unbeatably popular in [...] Punjab", its "best-loved summer drink", and "the air conditioner of the Punjab".
Lassi originated in the Punjab region of the Indian subcontinent. The word lassi means yogurt mixed with water in Punjabi.
Lassi is prepared by blending yogurt, water, and spices. In Punjab, the yogurt is traditionally made from water buffalo milk. However, variations of lassi can be prepared in different ways. Cumin and cardamom are the most common spices added to lassi. Lassi is traditionally served in a clay cup known as kulhar.