Smash burgers are having a moment — and for very good reason. A thin patty pressed hard onto a ripping-hot flat top creates caramelised, crispy edges and an insane amount of flavour that a thick hand-formed patty simply cannot replicate.
The science behind it is called the Maillard reaction — the browning process that creates flavour happens fast and across the entire surface when you smash. More contact with the hot metal means more crust, more flavour, more everything. Once you make one you’ll never go back to a thick patty.
The Beef
The beef blend matters more than anything else. You need fat — this is not the place for lean ground beef.
Best options:
- 80/20 ground chuck — widely available, reliable, perfect fat content
- 75/25 if you can find it — even more flavour
- Fresh-ground brisket and short rib blend — the gold standard if you want to go all in
Form loose balls of about 2.5oz each. Don’t compress them tightly — you want them to smash easily and spread into a thin, wide patty. Two balls per burger is the move for a proper double smash.
The Setup
Preheat your flat top griddle to high heat — you want the surface around 400–450°F. A drop of water should vaporise immediately on contact. If it just sits and sizzles, you’re not hot enough yet.
Lightly oil the surface with a high smoke-point oil — canola, avocado, or grapeseed. Wipe it thin with a folded paper towel held by your tongs.
Get your tools ready before you start:
- A heavy stainless steel spatula with a thin, sharp edge
- A small piece of parchment paper to smash through (stops the meat sticking to your spatula)
- A dome lid or second spatula for steaming the cheese
- Cheese slices ready to go — you’ll need to move fast
The Cook
Place a ball of beef on the hot griddle. Immediately place a square of parchment over it and press down hard with your spatula. You’re aiming for about ¼ inch thick — really flat, wider than you think it needs to be. Hold the press for a full 10 seconds.
Season immediately with salt and pepper directly on top.
Now leave it completely alone for 2 to 2.5 minutes. Don’t touch it, don’t move it, don’t press it again. You’re building the crust — that deeply browned, lacy edge is the whole point of a smash burger and you only get it by leaving it alone.
When the edges look visibly brown and crispy and the top has changed colour about halfway up, it’s time to flip. Use a thin sharp spatula, get it low and flat, and scrape it from the griddle cleanly — make sure you get all those crispy bits.
Cook the second side for just 60 to 90 seconds. Place your cheese slice on immediately after flipping and cover with a dome lid to melt it fast.
The Double Smash Stack
For a proper double smash burger: place your second ball of beef directly on top of the first patty right after you flip it. Press lightly to join them together. Let the cheese melt between the patties for 30 seconds, then flip the whole stack once more for 20 seconds to finish.
The result is two thin, crispy-edged patties fused together with melted cheese in between — significantly better than two separate patties stacked at the end.
The Bun
Toast your bun on the griddle in the residual butter and beef fat for 30 to 60 seconds until golden brown. This step is not optional. A toasted bun holds up to the juicy patty and adds another layer of flavour from the rendered beef fat.
Use a soft, slightly sweet bun — a brioche or potato roll works perfectly. Martin’s potato rolls are widely considered the gold standard for smash burgers and for good reason.
The Sauce
Classic smash burger sauce:
- 3 tbsp mayonnaise
- 1 tbsp yellow mustard
- 1 tbsp ketchup
- 1 tsp pickle juice
- ½ tsp garlic powder
- ½ tsp onion powder
- Pinch of paprika
Mix well and refrigerate for at least 30 minutes before using. The flavours need time to come together. Makes enough for 4 to 6 burgers.
The Build
Bottom bun (sauced) → shredded iceberg lettuce → sliced pickles → double smash patties with cheese → finely diced white onion → top bun (sauced).
Simple. Classic. Correct. Don’t overthink the toppings — the patty is the star.
Quick Reference
| Element | Detail |
|---|---|
| Beef | 80/20 ground chuck, 2.5oz balls per patty |
| Griddle Temp | 400–450°F — ripping hot |
| Smash | Hard press for 10 seconds to ¼ inch thick |
| First Side | 2–2.5 minutes — do not touch |
| Second Side | 60–90 seconds with cheese on immediately |
| Bun | Toasted in beef fat on the griddle |
| Total Cook Time | Under 5 minutes per batch |
Tips for Success
Temperature is everything. A griddle that isn’t hot enough produces pale, steamed patties instead of the crispy caramelised ones you’re after. Don’t rush the preheat.
Use American cheese. It melts perfectly and is the right call for smash burgers. No debate, no substitutions. Save the fancy cheese for a different burger.
Work fast. The whole cook from smash to plate is under 5 minutes per batch. Have everything prepped and ready before the first ball hits the griddle.
Don’t move the patty after smashing until the edges are visibly browned. Every time you touch it you break the crust you’re building.
Looking for the best flat top griddle to run this cook on? Check out our flat top griddle guide — including our top pick, the Blackstone 36″.
