Brewdog's marshmallow and chocolate stout is a cheeky 7 per cent. It sounds utterly luxurious and decadent and it certainly hits all the right flavour notes. But it's not anything exceptional or truly memorable. The brewery's Jet Black Heart, for example, had a much more rounded flavour and was a much less fussy drink at a cheaper price.
Expert summary: It's the work colleague you always assumed would be a good laugh on a night out. But while a decent time was had by all, in the cold light of day the evening was just OK and you wouldn't be in a rush to repeat the experience.