USA · Meat Dishes · Quick

Smash Burger

Name: Smash Burger
Prep time: 8 min
Cook time: 17 min
Total time: 25 min
Yield: 4 servings
Cuisine: American
Ingredients: 680 g ground beef, 80/20 fat; 1 tsp fine salt; 1 tsp cracked black pepper; 4 slices American cheese; 4 potato buns or brioche buns; 1 tbsp neutral oil or clarified butter; 1 white onion, very thinly sliced; 60 ml mayonnaise; 1 tbsp ketchup; 1 tbsp yellow mustard; 1 tsp pickle brine or apple cider vinegar; 1 tsp garlic powder; pickles, shredded iceberg lettuce, tomato

The smash burger is the most significant development in American burger cookery in decades — a technique that inverts everything traditional burger advice tells you to do. Instead of forming a shaped patty and handling it gently, you place a loose ball of cold 80/20 ground beef on a screaming-hot cast-iron griddle or skillet, then press it flat instantly with maximum force. The entire physics of the burger changes: the thin patty achieves near-total surface contact with the hot metal, triggering the Maillard reaction across the full face of the burger rather than just the edges. The result is a hamburger that is almost entirely crust — dark, crispy, lacey-edged, deeply savory — with a thin, juicy interior. American cheese, with its uniquely high moisture content and engineered melt point, is not optional. No other cheese melts completely in the 30 to 45 seconds available between flip and serve.

25 min 720 kcal 4 serves Medium⚡Quick🇺🇸USA★★★★☆4.2· 5 reviews

Ingredients

ServingsMetric

680 gground beef, 80/20 fat
1 tspfine salt
1 tspcracked black pepper
4 slicesAmerican cheese
4 potato buns or brioche buns
1 tbspneutral oil or clarified butter
1 white onion, very thinly sliced
60 mlmayonnaise
1 tbspketchup
1 tbspyellow mustard
1 tsppickle brine or apple cider vinegar
1 tspgarlic powder
pickles, shredded iceberg lettuce, tomato

Note from Sergei

Sergei Martynov

“Three things determine whether a smash burger succeeds or fails. First: the beef must be cold. Room-temperature beef spreads unevenly when smashed and does not achieve the same crust formation — cold fat stays together and then renders suddenly when it hits the hot surface, which is what creates the lacey, crispy edges. Keep the balls in the refrigerator until the very moment they go into the pan. Second: the pan must be genuinely, aggressively hot — smoking. A pan that is merely hot will sear rather than char, producing a cooked surface without the depth of flavor that comes from true high-heat caramelisation. Third: scrape the crust. When you flip the patty, you must scrape every dark bit of crust off the pan and keep it with the patty. The crust is not a byproduct of cooking — it is the point of cooking.”

For a double smash burger: divide the beef into 8 portions of about 85 g each and cook two patties simultaneously. Stack them with cheese between (one slice on each patty) so that when they are stacked, both layers of cheese are inside the burger, melting together. Double smash burgers are the standard at dedicated smash burger restaurants — the two thin patties give twice the crust surface area with barely any additional cooking time. The smash sauce recipe scales easily and keeps refrigerated for 2 weeks. For a spicy version, add 1 teaspoon of sriracha and ½ teaspoon of cayenne to the sauce.

Method

Make the smash sauce and prep everything before cooking. Whisk together the mayonnaise, ketchup, mustard, pickle brine, and garlic powder. This is the smash burger sauce — a variant of Thousand Island dressing with a sharper edge. Refrigerate. Butter the buns and toast them on the cold griddle before heating it — set them aside when golden. Slice the onion paper-thin if using. Divide the cold ground beef into 4 equal portions (about 170 g each). Roll loosely into balls — do not compress or overwork. The beef must be cold when it hits the pan; warm meat spreads instead of smashing. Have all toppings, the cheese, and the sauce ready before you begin cooking. A smash burger cooks in under 3 minutes per patty — there is no time to find the pickles once you start.
Heat the griddle to smoking. Place a cast-iron skillet or flat cast-iron griddle over the highest heat your stovetop can produce. Leave it on maximum heat for 5 full minutes. The surface must be between 230 and 260°C (450 to 500°F) — this is approximately the temperature at which a drop of water vaporises instantly on contact. Add a very thin film of oil or clarified butter and allow it to shimmer and just begin to smoke. The cooking surface is the only piece of equipment that matters: it needs to be heavy (for heat retention) and completely flat (for full contact). A flimsy pan will drop temperature the moment the beef lands and produce steamed rather than seared meat.
Smash immediately and decisively. Place one ball of cold beef on the hot oiled surface. Immediately place a small square of parchment paper over the ball. Using the flat underside of a stiff, wide metal spatula — or a heavy flat object like a small cast-iron pan — press straight down with maximum force, holding for 10 seconds. The patty should spread to approximately 12 to 15 cm in diameter. Season the top surface immediately with salt and pepper. If using onion, scatter a small handful of paper-thin slices across the top and press them gently into the meat with the spatula.
Cook 90 seconds then flip. Leave the patty completely undisturbed for 90 seconds to 2 minutes. Resist any urge to move, press, or check it. The crust is forming against the hot metal, and interrupting it breaks the sear. The patty is ready to flip when: the edges have gone from pink to gray, a ring of dark brown crust has crept up the sides, and the patty releases easily when you try to slide a spatula under it. Using a thin, rigid metal spatula, scrape firmly under the patty and flip it in one definitive movement — scraping up every bit of the dark crust from the pan is essential, not optional. That crust is where all the flavor lives. Immediately place a slice of American cheese on the flipped patty.
Finish and assemble. Cook the second side for 30 to 45 seconds — just enough to seal it and melt the cheese completely. The cheese will have melted into a smooth, glossy sheet by the time you lift the patty. Place the patty on the bottom bun immediately. Repeat with remaining portions. Assemble while hot: bottom bun, smash sauce, patty with melted cheese, pickles, shredded iceberg lettuce, tomato, top bun with more sauce. Serve within 2 minutes — the crispness of the crust and the juiciness of the interior are at their absolute peak for about 90 seconds after leaving the pan.

FAQ

The smash technique maximises the Maillard reaction — the set of chemical reactions between amino acids and sugars that produces browned flavor compounds when meat is exposed to high heat. A conventional thick patty has a small surface-to-mass ratio: only the two flat faces and the narrow edge contact the pan, leaving most of the meat to cook by internal heat conduction. A smashed thin patty has an enormous surface-to-mass ratio: almost the entire mass of the beef is within a few millimetres of a hot surface, and the entire face of the patty can Maillard. More crust relative to the mass of meat means more flavor per bite. The lacy, craggy edges that form on a smashed patty contain the highest concentration of Maillard compounds.

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Comments (1)

Daniel Brooks
14d ago
The key really is pressing HARD in the first 10 seconds, after that dont touch it. I use a proper cast iron press now, worth every penny. Also dont buy lean beef 80/20 is the minimum for flavour.