Gruyère cheese is a hard Swiss cheese named after the town of Gruyères in Switzerland. It is made from cow's milk and has a smooth, creamy texture with a slightly nutty flavor. The cheese is aged for a minimum of five months, which enhances its taste and aroma. Gruyère is commonly used in various dishes, including the famous Swiss fondue and French onion soup. It melts well, making it a popular choice for cooking. The cheese is also known for its characteristic holes, although they are smaller compared to other cheeses like Emmental.