What is "mattha"

Mattha is an Indian spiced beverage made with lassi. Plain buttermilk is also called Mattha. Other ingredients 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 also known as Chaanch or Chaas; the term "Mattha" is generally used for the sweet version of the beverage, while "chaas" generally refers to the salty version. The beverage is also known as Mohi (in Nepali). salted or unsalted Chaas is called Taak (in Marathi) but the spiced version is called Mattha.