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In-N-Out Burger is a West Coast favorite known for its simple menu and high-quality ingredients. Founded by Harry Snyder and his wife Esther in 1948, the chain has remained committed to using fresh, never frozen beef patties made from grass-fed cattle.

The restaurant's signature Double-Double features two beef patties topped with American cheese, lettuce, tomato, and spread, all served on a toasted bun. Customers can also customize their order by adding grilled onions or a protein-style patty swap for a low-carb option.

In-N-Out Burger is particularly famous for its secret menu items, which are not listed on the official menu but can be ordered by customers who know what to ask for. Popular secret menu options include Animal Style fries topped with melted cheese and Thousand Island dressing, grilled onions added to any burger, and a 4x4 consisting of four patties and four slices of cheese.

In-N-Out Burger has maintained a loyal customer base over the years due in part to its strict quality control measures and commitment to using only the freshest ingredients. The chain's restaurants are also known for their clean and welcoming atmosphere, making them a popular destination for families and casual diners alike.

The restaurant is a staple on the West Coast, with a strong presence in California, Arizona, Nevada, Utah, Texas, Oregon, Colorado, and New Mexico.