What is Chaach (Buttermilk)?

Chaach is Indian skimmed buttermilk with live-culture

The milk is boiled, cooled down to warm, fermented to make Dahi Yogurt. The Dahi Yogurt is churned in the cool morning hours. The Makhan (White butter) would float that is skimmed off. After the butter has been removed, the remainder is called Chaach. Chaach is low in fat (Makhan was removed), with live culture, and most of the lactose was changed into the lactic acid.

Unfortunately, the British called it Buttermilk. This is totally a different product than the buttermilk sold in United States. What is American Buttermilk?

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