If you've ever visited Serendipity 3 in New York City, you are probably aware of—and hopefully have sampled—their signature dessert, the Frrrozen Hot Chocolate.
If you've never sampled this sweet treat, it's sort of like the richest, most decadent, most tricked-out-with-chocolate Frappuccino-type drink (sans coffee, of course) that you've ever tasted. With the sheer amount of chocolate in this drinkable dessert, it gets into every sip, slurp, or bite (because the consistency is such that it works with a straw or a spoon).
This adaptation, believe it or not, is even more decadent than Serendipity 3's, employing cream instead of milk and even more chocolate than the original--but if you're feeling guilty, simply split it into smaller servings. They won't be huge, but I promise, they will be mighty.