Jarlsberg is a Norwegian semi-soft cheese known for its mild, sweet, and nutty flavor and large, round holes, similar to Swiss cheese. The large holes are a result of a special bacterial culture used in a high-tech, controlled environment during production. It is made from pasteurized cow's milk and is a versatile cheese that can be eaten on its own, used in sandwiches, melted in hot dishes, or featured on a cheese board.