First we need to treat mould, but this is mainly for iron / aluminium.If its nonstick then you can use it as such.I first washed it well, soaked in rice cooked starch water overnight.Then immersed in heated oil for 5 mins,switched off and left it in that oil overnight.Now the mould is ready.
Extract coconut milk , measure and keep aside.
To a mixing bowl - add maida,rice flour and powdered sugar.
Add salt and sesame seeds.Mix well.Get ready with coconut milk and the mould.
Add the coconut milk and mix well. It should form a slightly thin batter.If the batter is thick then add little water.Set aside.
Now heat oil, dip the mould in it till its heated atleast for 15 seconds.Then immediately dip the mould in the batter so that 3/4th of mould is immersed in the batter.The batter will stick to the mould.
Now carefully dip the mould in preheated oil. Leave for few seconds.Make sure to dip the mould in preheated oil each time before dipping in the batter.
Then shake the mould for the murukku to release from mould.If it doesn't come out use a fork to pull it out.Fry till golden.Repeat until you finish the entire batter.
Turn over and cook till golden on both the sides.Remove,drain in tissue paper.Cool down then store.