In-N-Out Burger is a popular fast-food chain based in California, known for its simple menu and fresh ingredients. Founded in 1948, it specializes in hamburgers, fries, and milkshakes, emphasizing quality over quantity. The chain has a loyal customer base and is famous for its "secret menu," which includes variations like the "Animal Style" burger. The company operates primarily in the western United States, with a focus on maintaining a family-owned atmosphere. In-N-Out is recognized for its commitment to customer service and has a unique approach to food preparation, using fresh, never frozen, ingredients in all its offerings.