For serving I sprinkle sugar on hot appams and pour the coconut milk (with cardamom powder) over it!I find it more enjoyable than mixing sugar to coconut milk itself.
The first milk is used as side dish and the second milk is mixed with appam batter.
Have not added sugar to the batter if you want you can add.
The appam kadai should be hot when poured and should be closed and cooked in medium flame.
Add baking soda only before making appams.