In a heavy bottomed pan whisk together milk, cocoa powder and corn flour until there are no large lumps.

Now put the pan on gas and cook this mixture on medium heat for a couple of minutes and whisk constantly to prevent lumps from forming.

When the mixture begins to thicken, take the pan off the heat and immediately pour the mixture into bowl or into small jars or ramekins.

Keep the pudding in the fridge for 4 to 5 hours, or until it is completely set.

Demould it carefully on a plate and dust some cocoa powder on top and enjoy!