According to Starbucks' website, the latte contains "espresso, steamed milk, and flavors of caramelized chestnuts and spices". Probably best enjoyed next to an open fire, although preferably not roasting over one. The drink was hot, though.
Mel Tormé's favorite beverage has a lot going on, just like his songwriting career. Initially, the drink comes on strong with caramel flavors that quickly give way to a roasted nuttiness with a hint of cloves. It reminded me of the taste of roasted nuts you'd get from a street cart or at a baseball game.
While my first impression of the drink was of overwhelming sweetness, the spiced flavor soon gave way to slightly bitter notes, which, I guess, is understandable given what the drink is supposed to evoke.