Imagine Horlicks or Ovaltine, but actually delicious.
You know how you can get some bang-average hot chocolate, and it's fine, but then you get a fancy one, and it's amazing, and makes you think of sitting in a continental piazza sipping the rich chocolate goodness on a crisp winter morning?
That... but for malt drinks.
The nearest I've found is Milo, any ideas would be gratefully received.