Add boiling water and mix into a light pap (i.e not too thick).

Use kitchen plastic and cover the surface (make sure the plastic is touching the surface of the custard pap i.e to prevent forming skin at the top) allow to cool at room temperature.

Add the cooled custard pap and Mix whipped cream + icing + chilled milk and whip till stiff peak,

Store in airtight container and refrigerate for couple of hours then serve