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The Big Mac is a signature double-decker hamburger from McDonald's, featuring two beef patties, special sauce, lettuce, cheese, pickles, onions, and sesame seeds on a three-part sesame seed bun. It's one of the most iconic fast-food items globally, known for its distinctive 'two all-beef patties' jingle and layered structure.
A standard Big Mac is high in fat and carbohydrates, providing a significant amount of protein from the beef patties, along with sodium and iron. It contains roughly 550 calories per serving, with a notable portion coming from fat and refined carbs from the bun.
The Big Mac's cultural impact is so profound that it inspired the 'Big Mac Index,' an informal economic tool used to measure purchasing power parity between currencies. Its unique three-part bun design was originally created to hold the extra ingredients without the burger falling apart.