Guinness beer is a dry Irish Stout that originated in.....you guessed it, Ireland! - Dublin to be exact. It dates back to the 1700s and is a best seller in Ireland today. It is prepared from malted barley, roasted unmalted barley, water, and brewer's yeast. It's thick, rich, and creamy, tasting of malty sugariness and hoppy bitterness with notes of coffee and chocolate.