I tried to make a "S'Mores Stout" this summer. A little smoked malt, some vanilla, cocao nibs, and lactose for sweetness. It wasn't terrible, but I don't care for it. A bit too much smoke, a little too sweet, not enough chocolate. I only made 2.5 gallons, and it's been on tap since May. I've blown through 4-5 five gallon batches and I'm still not done with it. I'd dump it, but it's not a bad beer and I don't have anything else on tap right now.