Soak the china grass in 100 ml water for 15 minutes.
In a saucepan, combine the coconut milk, remaining water, sugar and salt. Keep on low flame, making sure it doesn't boil.
As soon as the mixture is heated, add the soaked china grass along with the water and cook till the strands are completely dissolved. Remember to cook on really low flame.
Switch off, add the pandan essence.
In a bowl, add half the chickoos into bottom. Pour the prepared pudding mixture. Allow it to settle to room temperature.
Top with the remaining chickoo and refrigerate till serving.