The main ingredient in a typical burger is ground beef. This protein-rich meat is typically formed into a patty and grilled or fried before being served in a bun, along with a variety of toppings such as lettuce, tomato, cheese, onions, and condiments like ketchup and mustard. While beef patties are the most traditional, there are many variations, including turkey, chicken, and plant-based options for those who prefer alternatives. The versatility of the burger allows for countless combinations and styles, making it a popular choice worldwide.