A cheeseburger is a popular type of sandwich that consists of a cooked beef patty topped with a slice of cheese. The cheese is usually melted and can be made from various types, such as cheddar, American, or Swiss. Cheeseburgers are typically served in a bun and may include additional toppings like lettuce, tomato, onions, and condiments such as ketchup and mustard. Cheeseburgers are often enjoyed at fast-food restaurants, diners, and barbecues. They can be customized to suit individual tastes, with options for different meats, including turkey or veggie patties. The dish is a staple in American cuisine and has gained popularity worldwide.