Take a pan.Add cornflour,sugar, cocoa powder and milk.Mix them properly so that no lump is left.Add the rest of the milk.

Switch on the gas.Keep stirring so that it doesn't get stick to the pan.

If the consistency is not maintained,add little milk and keep stirring.

Now add butter, Chocolate and Chocolate syrup.

Once it reaches it's desired consistency,pour them in a serving bowl.

Garnish them with white chocolate.

Serve chill.