In a huge mug (I like at least 16 oz!) put three teaspoons sugar (rough, heaping, hastily scooped out of the sugar bowl - let's not get meticulous here!), and a teaspoon cocoa powder (make it the good stuff - Ghirardelli, Godiva, Rapunzel, etc.). Add a teensy pinch of cinnamon, a teensier pinch of salt, and a tiny drible of milk - just enough to mix it up into a thick syrup. ONLY THEN do you add milk to top it up, stirring madly all the while. Pop in the nuker for two or three minutes (depending on your micro, and how hot you like it) and top according to your preference. My personal choice is marshmallows and a candy cane, but whipped cream works just as well. (So does a healthy splash of schnapps or other festive liqueur!)
Bon chance! Having just enjoyed a cuppa the very same (with the schnapps option), I'm off to beddies! Sweet dreams, visions of sugarplums and all that!