Classic Smash Burgers with Caramelized Onions
This recipe uses Chuck beef — specifically Ground Chuck (1-2 lbs).
Learn more about all Chuck cuts and cooking methods →
Prep
10 min
Cook
15 min
Total
25 min
Ground chuck's 80/20 fat ratio is the secret to the ultimate smash burger. When pressed hard onto a screaming-hot griddle, the fat renders out and the edges crisp up into lacey, caramelized perfection. Simple, fast, and absolutely addictive.
What Ingredients Do You Need?
- 1.5 lbs Ground chuck (80/20)
- 8 American cheese slices
- 2 large Yellow onion, thinly sliced
- 4 Burger buns, toasted
- 2 tbsp Butter
- to taste Salt and pepper
- for serving Pickles, ketchup, mustard
How Do You Make Classic Smash Burgers with Caramelized Onions?
- 1
Caramelize onions
Cook sliced onions in butter over medium-low heat for 15-20 minutes, stirring occasionally, until golden and sweet.
- 2
Form balls
Divide ground chuck into 8 equal balls (about 3 oz each). Do NOT season or overwork the meat.
- 3
Smash and season
Place balls on a screaming-hot flat griddle or cast iron. Immediately smash flat with a sturdy spatula. Season with salt and pepper.
- 4
Cook and cheese
Cook 2-3 minutes until edges are crispy and deeply browned. Flip, add cheese, cook 1 minute more.
- 5
Assemble
Stack two patties per bun with caramelized onions, pickles, and your condiments of choice.
What Are the Pro Tips for This Recipe?
- 💡 The griddle must be screaming hot — 450°F+ for proper crust formation.
- 💡 Only smash once, immediately after placing on the griddle. Don't press again or you'll squeeze out juices.
