When I need a chocolate experience, I'll put together what I'm told is
 an Italian-style hot cocoa.  I initially saw the recipe in the middle of
 an article in The New Yorker, which went something like this.  (Sorry
 that I don't know the by-weight equivalents.) 
 
     Mix 
         1/2 cup cocoa powder 
         1/3 cup white sugar 
         1 teaspoon cornstarch 
     with 
         1/4 cup water 
     in a saucepan over medium heat, stirring constantly.  Once this
     mixture comes to a boil, add 2 cups of liquid (water, brewed coffee,
     skim milk; the author recommended a cup of water and skim milk each)
     and stir over heat until heated through and mixed. 
 
 This produces a thick, quite rich brew, not for children, but highly
 chocolate-concentrated.  Clearly, it’s pretty much just empty calories,
 but not that much of them, and the fat is only what comes in your cocoa.

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