Step 1:
Shift the cocoa and sugar together into a medium-sized saucepan.
Step 2:
Dissolve the cornstarch in the water, and stir into the cocoa and sugar until it is a smooth paste.
Step 3:
Begin heating the mixture, stirring it with a whisk, and gradually pour in the milk.
Step 4:
Continue stirring with the whisk as you bring the liquid to a simmer.
Step 5:
Allow the chocolate to simmer for about 10 minutes, stirring often, until it is thick, glossy and completely smooth.
Step 6:
Serve steaming hot in coffee mug.
Step 7:
Serves six.
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