Mishti doi is a Bengali dessert that combines fermented doi curd—usually made from cow, buffalo, or goat milk—and sugar or jaggery (cane sugar). The process of making mishti doi involves cooking sweetened milk until it's thick and allowing it to ferment.
The fermented product is then combined with melted sugar and left to set. The dish is usually made in traditional earthenware jars, and it is always served well-chilled. Apart from West Bengal, mishti doi is found in Orissa, Bihar, and Bangladesh.