What is a smash burger?

By DesiSmash by Chef Hass · Nov 2026 · 3 min read

A smash burger is a burger made by pressing a ball of mince flat onto a very hot griddle, so it cooks into a thin patty with a crisp, lacy, deeply browned crust and a juicy middle.

That is the whole idea, and it is why smash burgers have taken over so many menus. The patty is not formed in advance and left to sit. It starts as a loose ball, hits the hot surface, and is flattened hard within seconds. The result is more crust, more flavour and a faster cook than a thick patty can manage.

At DesiSmash, Chef Hass smashes every patty to order for customers across Leicester and Glenfield. Here is what actually happens, and why it matters when you bite into one.

How a smash burger is made

Start with cold mince. Beef with around 20 per cent fat (often sold as 80/20 chuck) gives the best flavour. The fat is what fries the edges of the patty.
Portion into loose balls. The mince is not packed or kneaded. Handling it as little as possible keeps the texture tender instead of rubbery.
Heat the griddle until it is properly hot. A smash burger needs far more heat than a normal frying pan on a weekday night, roughly 230°C or hotter on a flat-top or heavy cast iron.
Smash it. The ball goes down and is pressed flat straight away with a stiff spatula or press. A small square of baking paper on top stops the mince sticking to the tool.
Season and leave it alone. Salt goes on after the smash, directly on the patty on the griddle. Most of the cook happens on the first side, then the patty is scraped up with its crust intact and flipped briefly.
Cheese and build. Cheese goes on as soon as the patty is flipped so it melts into the lacy edges, then the patty goes onto a toasted bun with sauce and toppings.

Why it tastes different

Flattening the ball turns a lump of mince into a wide, thin disc, and that is where the flavour comes from. A thin patty has far more surface touching the hot griddle for the same weight of meat. Browning reactions, known as the Maillard reaction, take place once the surface passes roughly 140°C, and they create the roasted, savoury flavour people love. More contact surface means more of that flavour in every bite.

The fat matters too. As the patty sizzles, melted fat runs out and fries the edges, which is why a good smash burger has those thin, crunchy, almost-lacy borders. It is a texture a thick patty cannot copy.

What makes a really good one

Fat ratio. Lean mince dries out in a thin patty. About 80/20 keeps it juicy.
Heat and speed. A hot surface and a quick smash give crust without overcooking.
Salt at the right moment. Salting the mince in advance changes the texture and can make it dense. Season on the griddle instead.
Melty cheese. A cheese that melts evenly, such as American cheese, holds the burger together. We cover the best options in our guide to cheese and sauces for smash burgers.
A soft, buttered bun. A butter-toasted brioche bun supports a thin patty without hiding it.

Where do smash burgers come from?

The style is often traced back to American diners and the Oklahoma onion burger tradition, where thin onions are pressed into the patty on the griddle. Many cooks have their own version of the story, but the principle has stayed the same: a thin patty, a hot surface and a hard crust.

Quick answers

Are smash burgers cooked all the way through?

Yes. A thin patty cooks through in a couple of minutes, with no pink in the middle. The Food Standards Agency advises cooking burgers until they are piping hot all the way through, which is 70°C for two minutes or an equivalent combination of time and temperature.

Is a smash burger the same as a slider?

No. A slider is a small burger, defined by size. A smash burger is defined by the method: the patty is pressed flat on a hot surface. Many smash burgers are full-sized, with two or three patties stacked.

Can I get a chef-made smash burger in Leicester?

Yes. DesiSmash cooks Original and Desi-spiced smash burgers every Friday, Saturday and Sunday, from 5 pm, with collection and delivery in Leicester and Glenfield. Browse the menu and pre-order a slot.