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In-N-Out Burger is a popular American fast-food chain known for its simple menu and high-quality ingredients. Founded in 1948 by Harry Snyder and his wife Esther in Baldwin Park, California, the chain has maintained its commitment to using only fresh, never frozen beef patties and produce.

The restaurant offers a limited but distinctive menu that includes cheeseburgers made with two or three beef patties, depending on customer preference. The signature Double-Double features two patties, American cheese, lettuce, tomato, and a secret sauce all sandwiched between a toasted bun.

In-N-Out Burger has gained a loyal following for its dedication to using only the freshest ingredients, including Angus beef raised without antibiotics or added growth hormones. They also use 100% real cheese and produce that is never frozen.

A defining characteristic of In-N-Out Burger is its ability to adapt to local tastes while maintaining consistency across locations. They offer regional menu items like the "4x4" in the Southwest, which features four patties and four slices of cheese.