Mattha (bengali: মাঠা, romanized: māṭhā, hindi: मट्ठा, romanized: maṭṭhā) is a beverage, originating from the indian subcontinent, made with dahi (yogurt) or buttermilk mixed with spices and sugar. plain buttermilk is also called mattha in the indian states of bihar, tripura, uttar pradesh and west bengal. ingredients added to buttermilk to make mattha may include mint, roasted cumin seeds, asafoetida, curry leaves, salt and sugar.mattha may also be smoked before serving for flavour. it is generally served before or after a meal, though it can also be consumed with the meal, and it is thought to help with digestion. mattha is similar to chaas, which is also called chhanch or ghol, but sp...

Source: Wikipedia