Behold Chocolate Bock!
Here's what the tag has to say: For centuries, the world's finest brewers have created rich, complex dark beers known as bocks. The best bocks, like Samuel Adams Chocolate Bock, display many layers of luxurious flavors. For our bock, only hand selected hops from the world's oldest growing area are combined with a complex selection of carefully roasted malts and a centuries old brewing process. Finally, the beer is slowly aged on a a bed of rich chocolate that is specially blended by the master chocolatiers at Scharffen Berger Chocolate. This aging on special chocolate creates a flavor like no other.
Picture courtesy of Dan the Geologist.