Number of Servings: six people,

Mix the cornstarch with a few tablespoons of the milk.
Put the remainder of the milk on to heat in the double-boiler.
When the milk comes to the boiling point, stir in the cornstarch and cook for ten minutes.
Have the chocolate cut in fine bits, and put it in a small pan
Add the sugar and water, and place the pan over a hot fire.
Stir constantly until the mixture is smooth and glossy.
Add this to the hot milk, and beat the mixture with a whisk until it is frothy.
Or, the chocolate may be poured back and forth from the boiler to a pitcher, holding high the vessel from which you pour. This will give a thick froth.
Serve at once.