Replies. Avoid adding ferment inhibitors Avoid adding ingredients like Baking soda, Baking powder and Yogurt before the batter ferments since these inhibit the growth of wild yeast. • Most often eaten at lunch or dinner, dosas are usually served in pairs with chutney, sambar, or other accompaniments. Idlis: Fill the steamer vessel with 2 cups of water and bring to a boil. what to do with unfermented idli batter [CDATA[ The first step to make sure that doesn’t happen is by having a dedicated, well-seasoned pan for dosas. //