Ultimate Oklahoma Onion Smash Burgers (Crispy, Juicy & Easy)
There are plenty of burgers worth making, but few deliver as much flavor with so few ingredients as the Oklahoma Onion Smash Burger.
Born during the Great Depression, this burger became famous because cooks stretched expensive beef with paper-thin onions. As the burger cooks, those onions caramelize directly into the meat, creating crispy, lacy edges, incredible flavor, and one of the best burgers you’ll ever make.
The best part? You don’t need expensive equipment or years of experience. Whether you’re cooking on a Blackstone griddle, another flat-top, or a cast-iron skillet, this recipe is approachable enough for beginners while delivering restaurant-quality results.
At Smoke, Griddle & Grill, we believe backyard cooking should be simple, approachable, and fun. This recipe checks every box.
Why You’ll Love This Recipe
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- Beginner friendly
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- Ready in about 30 minutes
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- Budget friendly
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- Incredible crispy crust
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- Sweet caramelized onions in every bite
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- Restaurant-quality results at home
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- Perfect for backyard cookouts
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- Uses simple ingredients you can find anywhere
The Story Behind the Oklahoma Onion Burger
The Oklahoma Onion Burger has been a regional favorite for nearly a century.
During the Great Depression, beef was expensive while onions were cheap. Restaurant owners discovered that piling paper-thin onions underneath a beef patty allowed them to stretch the meat further while creating an incredible burger.
As the onions cooked, they became sweet, tender, and caramelized while the beef developed a crispy crust. That simple technique turned an economical meal into an American classic that remains one of the best burgers you’ll ever eat.
Sometimes the simplest recipes really are the best.
Why This Recipe Works
Unlike a traditional burger, the onions aren’t added afterward.
Instead, they’re smashed directly into the beef, where they steam, fry, and caramelize at the same time.
The result is:
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- Crispy beef edges
- Sweet caramelized onions
- Incredible beef flavor
- Perfect cheese melt
- A juicy burger with very little effort
It’s one of those recipes that tastes far more complicated than it actually is.
Ingredients You’ll Need
This recipe keeps things simple.
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- 80/20 ground chuck
- Yellow onions
- American cheese
- Brioche buns
- Kosher salt
- Freshly cracked black pepper
- Butter
Optional toppings include dill pickles, mustard, mayo, or your favorite burger sauce.
Choosing the Right Beef
If you’re new to smash burgers, this is the most important tip in the entire recipe.
Use 80/20 ground chuck.
That extra fat creates the signature crispy crust while keeping the burger juicy.
Lean beef simply doesn’t produce the same results.
The Secret to Perfect Onions
The thinner the onions, the better.
A mandoline works best, but a sharp knife works just fine if you take your time.
Paper-thin onions soften quickly and caramelize beautifully before the burger finishes cooking.
Thicker slices often remain crunchy instead of melting into the beef.
Equipment
You don’t need much equipment.
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- Flat-top griddle
- Cast-iron skillet (works great too)
- Heavy metal spatula
- Burger press (optional)
- Parchment paper
- Sharp knife or mandoline
- Instant-read thermometer
Before You Start
Smash burgers cook quickly.
Before turning on the griddle:
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- Slice the onions.
- Portion the beef.
- Butter the buns.
- Prepare your toppings.
- Have your spatula ready.
Once the beef hits the griddle, everything moves fast.
Beginner Tips
If this is your first smash burger, these tips will help you succeed.
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- Use 80/20 beef.
- Slice onions paper thin.
- Toast the buns.
- Smash only once.
- Cook over high heat.
- Don’t overcrowd the griddle.
- Have everything ready before cooking.
Common Mistakes
Using Lean Beef
Lean beef won’t create the crispy crust that makes smash burgers famous. For more beginner-friendly fixes, see our guide to the biggest BBQ mistakes beginners make.
Pressing More Than Once
Only smash the burger one time.
Pressing after the crust develops simply squeezes out flavorful juices.
Thick Onion Slices
Thin onions caramelize.
Thick onions steam.
The difference is huge.
Cooking Too Cool
High heat creates the crust.
Low heat steams the meat.
Store-Bought Seasonings
Traditional Oklahoma Onion Burgers use nothing more than kosher salt and freshly cracked black pepper.
If you’d like to experiment, quality store-bought seasonings such as Kinder’s The Blend, Meat Church Holy Cow, or Killer Hogs AP Seasoning work well without overcomplicating the recipe.
What to Serve With These Burgers
These burgers pair perfectly with:
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- French fries
- Onion rings
- Coleslaw
- Pasta salad
- Smoked baked beans
- Grilled corn
- Pickles
Storage & Reheating
Store leftover patties in an airtight container in the refrigerator for up to three days.
For the best texture, reheat them on a hot skillet instead of using the microwave.
Frequently Asked Questions
Can I make these without a Blackstone?
Absolutely. A cast-iron skillet works extremely well.
What’s the best beef?
80/20 ground chuck provides the best balance of flavor, juiciness, and crust.
Can I freeze them?
Yes. Cooked patties freeze well for up to three months.
Why do you only smash the burger once?
Smashing only once creates maximum contact with the hot cooking surface, allowing the Maillard reaction to develop a deep, flavorful crust while keeping the burger juicy.
Final Thoughts
The Oklahoma Onion Smash Burger proves that incredible food doesn’t have to be complicated.
With a few everyday ingredients, a hot cooking surface, and the right technique, you can create burgers that rival your favorite burger joint.
Whether you’re cooking on a Blackstone, another flat-top griddle, or a cast-iron skillet, this recipe is approachable enough for beginners and delicious enough to become a regular part of your backyard cooking rotation.
If you make these burgers, I’d love to hear how they turned out. Share your results, experiment with different toppings, and most importantly, enjoy the process. Great backyard cooking is all about sharing good food with great people.
Ultimate Oklahoma Onion Smash Burgers
Equipment
- Flat-top griddle or large cast-iron skillet
- Heavy-duty metal spatula or burger press
- Metal griddle scraper
- Mandoline slicer or sharp chef’s knife
- Parchment paper squares
- Instant-read meat thermometer
Ingredients
- 2 pounds 80/20 ground chuck
- 2 large yellow onions sliced paper thin
- 1 1/2 teaspoons kosher salt or to taste
- 1 teaspoon freshly ground black pepper or to taste
- 8 slices American cheese
- 4 brioche hamburger buns
- 2 tablespoons softened butter for toasting the buns
- Dill pickle chips optional
- Yellow mustard optional
- Mayonnaise or burger sauce optional
Instructions
- Preheat the griddle or cast-iron skillet over medium-high heat until the cooking surface reaches approximately 425°F.
- Divide the ground chuck into 8 loose, equal 4-ounce balls. Do not tightly pack or flatten the beef.
- Slice the yellow onions as thinly as possible using a mandoline slicer or sharp knife. Separate the slices into loose piles.
- Lightly butter the cut sides of the brioche buns. Toast them cut-side down on the griddle until golden brown, about 1 to 2 minutes. Remove and set aside.
- Place 8 equal piles of sliced onions on the hot griddle, leaving enough space between each pile to smash the burgers.
- Place one beef ball directly on top of each onion pile.
- Cover each beef ball with a square of parchment paper. Press down firmly with a burger press or sturdy metal spatula until the patty is very thin and the onions are pressed into the beef.
- Remove the parchment paper. Season the exposed side of each patty with kosher salt and black pepper.
- Cook without moving the patties for 2 to 3 minutes, or until the edges are deeply browned and crispy.
- Use a sharp metal spatula or griddle scraper to firmly scrape underneath each patty, keeping the browned crust and onions attached. Flip each patty once.
- Immediately place one slice of American cheese on each patty. Cook for another 1 to 2 minutes, until the onions are tender, the cheese is melted, and the beef reaches an internal temperature of 160°F.
- Stack two patties together for each burger.
- Place the stacked patties on the toasted buns. Add dill pickles, mustard, mayonnaise, or burger sauce as desired. Serve immediately.
