There are burgers, and then there are burgers that know exactly what they’re doing.

The Oklahoma Onion Smash Burger falls into that second category. It’s simple, fast, greasy in all the right ways, and built around one beautiful idea: smash a pile of paper-thin onions right into a beef patty and let the griddle do the heavy lifting.

You get crispy edges, sweet onions, melty American cheese, toasted buns, and just enough Rub Yer Meat BBQ Rub to bring the whole thing into backyard legend territory.

This is not a tall, fancy burger. This is a flat-top, napkin-required, don’t-talk-to-me-for-three-minutes kind of burger.

A Little History Behind the Oklahoma Onion Burger

The Oklahoma onion burger has humble roots, which is part of what makes it so good.

It’s most commonly traced back to El Reno, Oklahoma, where cooks started pressing thinly sliced onions into burger patties as a way to stretch ground beef further. Beef was expensive, onions were cheap, and hungry people still needed a good meal. Somewhere along the way, a budget-friendly workaround turned into one of the best regional burgers in America.

The magic is in the method. The onions don’t just sit on top like an afterthought. They cook directly with the beef, soaking up flavor while the patty builds that crispy smashed-burger crust.

Simple ingredients. Smart technique. Big flavor.

That’s the whole deal.

What You’ll Need

Ingredients

• 1 lb 75/25 ground beef
  • 80/20 works too if you can’t find 75/25
• 1 large yellow onion, sliced very thin
• Rub Yer Meat BBQ Rub
• 4 slices American cheese
• 4 burger buns
• Pickles
• Optional toppings:
  • Mustard
  • Mayo
  • Ketchup
  • Lettuce
  • Tomato
  • Grilled jalapeños
  • Extra onions
  • Whatever makes your burger feel loved

Equipment

• Griddle or cast iron skillet
• Mandoline slicer or sharp knife
• Burger press or sturdy spatula
• Parchment paper, optional but helpful

Step 1: Portion the Beef

Start with 75/25 ground beef if you can find it. That extra fat helps the burger stay juicy and gives you those crispy, griddled edges that make smash burgers so great. 

Portion the beef into ¼-pound balls.

Try not to overwork the meat here. Don’t knead it, pack it tight, or treat it like bread dough. Just gently form it into loose balls and leave it alone.

Loose beef smashes better. Tight beef fights back.

Step 2: Slice the Onion Thin

Using a mandoline, slice your yellow onion on the thinnest setting.

You can use a knife, but the mandoline gives you even slices, and even slices cook better. Thinness is the goal here. You want the onion slices so thin they’re translucent.

That’s what lets them soften, caramelize, and tangle into the beef instead of staying chunky and raw.

A quick note: mandolines are extremely good at slicing onions and wildly disrespectful toward fingertips. Use the guard.

Step 3: Preheat the Griddle

Preheat your griddle or cast iron skillet over medium-high heat.

You want it hot enough to sear the beef and cook the onions quickly, but not so hot that the onions burn before the patty is ready to flip.

If you’re using cast iron, give it a few minutes to fully heat up. Cast iron likes to take its time, then suddenly act like the surface of the sun.

Step 4: Build the Onion Pile

Place about 1 to 2 tablespoons of sliced onion in a small pile on the griddle.

Then place one ¼-pound beef ball directly on top of the onions.

Using a burger press or sturdy spatula, smash the beef down hard over the onion pile. The goal is to flatten the beef into a thin patty while pressing those onions right into the bottom side.

Season the top of the beef patty with Rub Yer Meat BBQ Rub.

Let the burger cook long enough to form a good sear. Don’t poke it. Don’t shuffle it around. Don’t start emotionally negotiating with it.

Let the griddle do its job.

Step 5: Flip and Cheese It

Once the first side has a good sear, scrape under the patty and flip it.

As soon as you flip, place a slice of American cheese on top of the patty.

This is not the time for cheese snobbery. American cheese melts exactly the way a burger cheese should melt.

Let the patty finish cooking while the cheese melts over the top.

Step 6: Toast the Buns

While the burger finishes, toast your buns on the griddle.

A toasted bun gives you better texture and helps keep the burger from turning into a soggy little regret sandwich.

You can toast them dry, or add a little butter if you’re feeling generous with yourself.

Step 7: Assemble the Burger

Place the cheesy onion-smashed patty on the bottom bun.

Add three pickles on top of the patty.

From there, build it how you like it. Mustard keeps it classic. Mayo adds richness. Ketchup is your business. Lettuce and tomato are allowed, but let’s not pretend they’re the reason we’re here.

Top it with the bun and serve hot.

This burger is best eaten right away, preferably standing near the griddle while pretending you were only going to have one.

Tips for the Best Oklahoma Onion Smash Burger

Use beef with enough fat

75/25 is ideal for this style because smash burgers need fat to create flavor and crispy edges. If you can’t find it, 80/20 still works great.

Slice the onions thinner than you think

Thick onions won’t cook fast enough. You want thin, soft, almost see-through slices that can cook into the beef.

Smash once, then leave it alone

The smash happens at the beginning. After that, let the patty sear. Moving it too much keeps the crust from forming.

What to Serve With Oklahoma Onion Smash Burgers

These burgers don’t need much, but they play well with:

• Fries
• Tater tots
• Potato chips
• Baked beans
• Mac and cheese
• Pickle spears
• A cold drink and zero plans for productivity afterward

Final Thoughts

The Oklahoma Onion Smash Burger proves that great food doesn’t have to be complicated.

A little beef. A pile of thin onions. A hot griddle. A hit of Rub Yer Meat. That’s it.

It’s crispy, juicy, oniony, cheesy, and just messy enough to remind you that some of the best food was never meant to be eaten politely.

So fire up the griddle, slice those onions thin, and rub yer meat like you mean it.

Oklahoma Onion Smash Burger Recipe

Servings

Makes 4 burgers

Prep Time

15 minutes

Cook Time

10 minutes

Ingredients

• 1 lb 75/25 ground beef
• 1 large yellow onion, sliced paper thin
• Rub Yer Meat BBQ Rub
• 4 slices American cheese
• 4 burger buns
• Pickles
• Optional toppings of choice

Instructions

1. Divide the ground beef into four ¼-pound balls. Handle the meat gently and avoid overworking it.
2. Slice the yellow onion as thin as possible using a mandoline or sharp knife. The slices should be almost translucent.
3. Preheat a griddle or cast iron skillet over medium-high heat.
4. Place 1 to 2 tablespoons of sliced onion in a small pile on the griddle.
5. Place one beef ball directly on top of the onion pile.
6. Smash the beef down firmly over the onions until it forms a thin patty.
7. Season the top of the patty with Rub Yer Meat BBQ Rub.
8. Let the patty cook until the bottom side is well seared.
9. Flip the patty and immediately add one slice of American cheese.
10. Toast the burger buns on the griddle while the patty finishes cooking.
11. Place the cheesy patty on the bottom bun, add three pickles, and finish with your favorite toppings.
12. Serve hot.

Notes

For the best results, use very thin onions and don’t move the patty once it’s smashed. Letting it sit on the griddle is what creates the crust.