Beef and Guinness pie is essentially beef and Guinness stew placed into a pastry base and topped with a pastry lid. The pie is baked until it's golden brown and it's known as a perfect dish for cold autumn days. The filling is typically made with beef cubes, mustard powder, oil, onions, celery, carrots, Guinness, beef stock, redcurrant jelly, bay leaves, parsley, and thyme.