Little-boy approved. No mixes, high-fructose corn syrup, or partially hydrogenated anything required.
1 cup milk of choice
1 tsp sugar (or sugar-free equivalent)
1 tsp unsweetened cocoa
Combine all ingredients in a ceramic or glass mug of choice. Heat in a microwave for 1 minute; stir vigorously to dissolve cocoa.
My taste testers prefer a garnish of seven mini-marshmallows.