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The science of the perfect smash

Leo ParkHead of kitchen · Nov 10, 2026 · 6 min read
Flat-top grill with flames

Every smash burger lives or dies by its crust. That lacy, crackling, deep-brown edge isn't luck — it's chemistry, timing and a little bit of brute force. Here's exactly how we do it, 4,000 times every Saturday.

1. The flat-top hits 260°

The Maillard reaction — the browning that creates hundreds of flavour compounds — kicks into high gear above 140°C. We run our steel at 260° so the surface browns in seconds, long before the inside overcooks.

"Ten seconds of pressure is the whole game. Any less and you get a burger. Any more and you get a cracker."

2. Ten seconds, full pressure

A 3oz ball of fresh chuck & brisket goes down, a square of parchment on top, and then the press. Maximum contact with the steel means maximum crust. We hold for ten seconds — counted out loud — then lift.

Close-up of a smash burger
The OG Double, 90 seconds after the smash.

3. Scrape, don't flip

A sharp, stiff spatula gets under the crust and keeps it attached to the patty, not the grill. One flip, cheese on, and it's done in under two minutes.

  • Fresh, never-frozen beef (frozen meat releases water — no crust)
  • 20% fat for flavour and lacy edges
  • Salt only after smashing

That's it. No secret machines, just heat, pressure and a crew that cares. Come watch them do it — every kitchen has an open grill. Find your nearest Smash'd.