I'm a big fan of this delicacy, but never had the guts to try and make it on my own till recently my mother-in-law gave me this fool-proof recipe. Till date I've made it twice, both the times with awesome results :)
1 Cup Rice White Rice rice / White / Any other than parboiled
1/2 Cup Coconut (grated)
1/2 Cup rice Cooked (preferably parboiled/matta)
1/2 Teaspoon Baking powder
To Taste Salt
Soak the white rice in water the morning before you plan to make Appam. It needs to be soaked in for a good time of max. 8 hours.
Drain the water from the pre-soaked rice and add it to a blender along with 1 cup grated coconut and 1 cup cooked rice. Add just a little bit of water (3-4 tablespoons) to make sure the blender runs smoothly.
Turn on the blender for about 5 min and make a smooth batter of the rice-coconut mixture. The trick is to make sure the batter is not too watery nor too thick. It would be similar to dosa batter just not as thick.
Pour out the batter into an airtight container and keep it in a warm place. Let this batter sit undisturbed till next morning.
An hour before making Appam, add the baking soda to the mixture and mix well. Close the container and keep it aside.
When you are ready to make the Appam, add in the required amount of salt and mix well.
Pour a ladleful of the batter into the middle of the Appam chatti/pan. Hold the sides of the pan and swirl it so the batter coats all sides.
Cover the pan with a lid and cook for couple of minutes. Remove and serve hot.