In-N-Out may be the definitive fast-food burger, but California is also home to some of the country’s most exquisite luxe versions.

The Office Burger Dry-aged beef, caramelized onion, apple-wood-smoked bacon compote, Gruyere and Maytag Blue cheeses and arugula. Father’s Office, Santa Monica, $12.

The Number One Ground sirloin with Crescenza and Gorgonzola Prelibato cheeses, bacon, caramelized onion, arugula and house-made Thousand Island dressing. 25 Degrees, in the Roosevelt Hotel, Hollywood, $12.

The Pretzel Burger Grass-fed Angus with Swiss cheese and caramelized onions on a house-baked pretzel bread roll. J Square Cafe, Venice, $9.50.

The Town Hall Burger Niman Ranch boneless ground chuck with heirloom tomatoes, butter lettuce and aioli. Town Hall, San Francisco, $13.

The Spruce Burger Niman Ranch beef ground in-house, house-pickled red onion and cucumber, and relish aioli on a house-made English muffin. Spruce, San Francisco, $13. [source: C Style]