The main ingredient in a cheeseburger is a beef patty. A cheeseburger typically consists of a cooked ground beef patty placed between two halves of a bun, with cheese being melted on top of the patty. While the classic cheeseburger features American cheese, various gourmet options can include different cheese varieties, such as cheddar, Swiss, or blue cheese, enhancing flavor. Cheeseburgers are a popular menu item in fast-food establishments and restaurants, with numerous topping options like lettuce, tomato, onions, pickles, and sauces, allowing for customization according to individual preferences. They are enjoyed worldwide and are a quintessential part of American cuisine.