In-N-Out Burger and the Smash Technique

The California burger tradition — exemplified by In-N-Out Burger (founded 1948, Baldwin Park, California) — represents the West Coast's approach to the hamburger: fresh (never frozen) beef, cooked to order, simple toppings, and a commitment to quality ingredients within a fast-food format. In-N-Out's "secret menu" (Animal Style: mustard-grilled patty, extra Thousand Island, grilled onions, pickles) is the most famous off-menu ordering system in American food. The smash burger technique — pressing a ball of ground beef flat on a screaming-hot griddle to maximise the Maillard crust — is the broader technique that has revolutionised American burger-making since the 2010s, producing a thin, lacy-edged, deeply crusted patty that prioritises surface area (and therefore crust) over thickness (and therefore juiciness).

**The smash burger:** a loosely packed ball of ground beef (70-80g per ball, 75-80% lean) placed on a screaming-hot flat griddle or cast-iron pan and immediately pressed flat with a heavy spatula or press until very thin (3-5mm). The pressing maximises the surface area in contact with the hot surface, producing a deeply browned, crispy, lacy-edged crust across the entire patty. Cooked for 2-3 minutes per side — the patty is thin enough that it cooks through quickly. Seasoned with salt and pepper only. Served on a soft, slightly sweet bun (Martin's potato roll is the standard) with simple toppings.

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