Question

Have you ever tasted fermented idly batter prepared by your mother? Can
you guess why it is taste sour?

Answer 1

Answer:

Idli batter if kept at room temperature will continue to ferment and Wil eventually turn sour. It's very difficult to stop the fermentation process at room temperature. ... Whenever you need to make idli soak them previous night and you Wil have your fresh batter ready without doing the grinding every time.