Sweetened yogurt or Mishti doi or Mithi Dahi is a fermented sweet yogurt and is famous sweet dish in the Indian states of West Bengal and Odisha . In this recipe the milk is condensed and then sweetened with either caramelized sugar or Jaggery and then allowed to ferment overnight . Mishti doi has a very rich and exotic taste. Traditionally it is prepared in earthen pots as the gradual evaporation of water through the earthen pot leads to further thickening of the yogurt. We usually get Mishti Doi only in shops specializing in Bengali sweets, but it is an extremely simple dish and can be easily made at home.