How to use oven to ferment Idli batter?

You can use Electric range or Gas range to ferment Idli batter

The answer depends on type of appliance, whether it is gas or electric.

Electric Range oven

Buy an extension chord that has a light bulb fixture on one end. Put in a 40 Watt bulb. Place it on the top rack. Place batter on the bottom Rack. Turn on the light bulb. Close the door. It will get your oven temperature to about 88º F. The ferment temperature for Idli batter is 86º F - 90º F. Check you temperature. All Ranges are different. You may have to go to a lower or higher wattage bulb.

Gas Range oven

Gas ranges have a pilot light. Check your ambient temperature. If it already between 86º F - 90º F, just use it. If it is higher, keep you door open slightly. If it is lower, buy an extension chord and use as for the Electric Range. Use 25 Watt bulb.

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