Guinness is a quintessential symbol of ireland and a pub favorite. That's what it's famous for. But when used for cooking, guinness stout beer helps tenderize the beef and also gives a rich, malty flavor to this chunky irish stew. It is also flavored with onions, carrots, garlic, and thyme. The stew can be made on the stovetop or in the oven. This recipe can be found in "The complete book of irish country cooking" By darina allen.