Soak china grass or agar agar in 1 cup water for 15 mins. Now heat gently till the agar agar melts. Set aside.

Take 1 tsp cornflour and add 2 tblspn milk and mix well. Set aside.

Take 1 cup milk in a sauce pan, add 3 tblsp sugar and mix well. Heat till it comes to a boil.

Add cornflour mix and vanilla and mix well. Add in half of the melted agar agar and mix well. Cook this for a min.

Pour it into serving cups till it comes half way through. Pop this in freezer for 10 mins to 15 mins till the top layer is little set.

Now make chocolate layer. Take 1 tsp cornflour, cocoa and 3 tblsp sugar in a sauce pan. Add in 1 cup milk and mix well. Heat this till it comes to a boil and cook for a min till it thickens.

Now add in salt and other half of the agar agar and mix well.

Pour this over the vanilla layer and pop it in fridge till set for 4 to 6 hours.

Serve cold.