In a sauce pan add milk and let it boil.In a small cup take 2 to 3 tbsp milk add corn flour and mix well.

Now add this milk in the sauce pan and mix well let it boil, now add dark chocolate and boil this for 1 to 2 min until it becomes thick

Now off the flame and pour the hot chocolate in the cup dust the cocoa powder on hot chocolate and add some dark chocolate and serve hot