Rinse both the rice varieties together for a couple of times. Soak both the regular rice for 4-5 hours, make a paste of the boiled rice. (You can also make the paste of the soaked rice and boiled rice together).
2
In a bowl warm add water, active dry yeast and sugar and leave to bloom.
3
In a grinder add the soaked rice and grated coconut and grind to a smooth paste. Transfer to a bowl and thin it down by adding the coconut milk and the yeast leave it to ferment for 12 hours.
4
Then add more coconut milk till desired consistency and leave to rest for another hour.
5
Spread a ladle full of the batter in a heated kadhai. Turn and tilt the pan so as to spread the batter.
6
Cover the pan and let the appam cook. The base would become nicely light golden.
7
Serve the appam hot or warm with vegetable stew or sweetened coconut milk.