Guinness Stew may well be the mother of all stews since anything simmered for hours is going to be wonderfully tasty. Arguably the most deeply flavourful sauce of all stews, with a rich dark brown flavour, this is an Irish classic. The not-so-secret ingredient that goes into Stew that gives the sauce the deep flavour and colour is Guinness Stout (or 'The Black Stuff' as we often say in Ireland), which is known to be much richer than most beers (the thick foam that gathers on the top of a pint).  Irish Stout is widely exported nowadays and other equally good Irish Stouts such as Murphys Irish Stout or Beamish) can be substituted in this recipe . All Irish Stout is so dark it is almost black and it’s why the gravy of the stew is such a beautiful deep brown colour. Don't get confused between a Beef and Guinness Stew and Irish Stew (which is more famous and authentic, made with lamb and more like a soup when served, with NO guinness). In an Irish Stew, the potatoes are...