Mix the instant coffee in hot water, dip the biscuits and arrange them in the serving tray.
Make a paste out of cornflour, custard powder, cocoa and 1/4 cup of cold milk. Ensure that no lumps are formed.
In a separate pan, boil the milk. Add sugar to it.
When the milk starts boiling add the paste made from cornflour, custard powder, cocoa and 1/4 cup milk. Keep on stirring till it starts thickening. It should be of pouring consistency.
Pour it all over the arranged biscuits.
Garnish it with the chopped nuts and grated chocolate.
Refrigerate and serve chilled ????