In winter months or colder places, ferment the batter by placing it in a closed oven with the bulb turned on. The warmth of the bulb put on will enhance faster fermentation. If you do not have instant yeast, first mix the dry active yeast in 2 to 3 tablespoons of warm water with a teaspoon of sugar. Leave it for about 10 minutes till it froths. Then add it to the batter and grind. Use fresh yeast for better and faster fermentation. Use a little lukewarm water for grinding. It will make the fermentation quicker. You may skip coconut in this recipe if you do not have it, but it tastes better with fresh or frozen coconut. You can use fresh coconut milk or even coconut milk made with coconut milk powder and add to this recipe. But accordingly reduce the water added to the batter while grinding If you prefer the traditional method of preparing batter, you can first soak rice (any short grained rice/ idli rice/ basmati rice) in water for about 6 to 7 hours and then grind with the same ingredients in this recipe leaving out the rice powder. You will get soft appams.