How long can you store fermented dosa batter in the fridge ?? I have batter that i grinded last 12 days ago. But we had lots of parties so we ate out most days. I still have lots of batter. Would hate to see it go to waste. After all my wet grinder broke so I took the effort to grind so much batter for 30 minutes. Is it safe to eat ? I think if I make it for breakfast lunch and dinner it should be done.