How to Make the Perfect Oklahoma Onion Burger
American Midwest · Easy · 25 min · 4 servings
A Depression-era classic where thinly sliced onions are smashed directly into the beef patty as it cooks, creating a deeply caramelized and crispy crust. Simple ingredients come together for an incredibly flavorful thin burger.
Why this recipe works
This Oklahoma Onion Burger recipe has been crafted to deliver restaurant-quality results in your home kitchen. At just 25 minutes from start to finish, it fits perfectly into a busy schedule without sacrificing flavor. Each serving comes in at 580 calories with 36g of protein, making it a balanced choice for any meal.
What you will need
This recipe uses 8 simple ingredients that you can find at any grocery store:
- 1.5 lbs ground beef 80/20
- 1 tsp salt
- 1 tsp black pepper
- 2 large yellow onions sliced paper thin
- 4 slices American cheese
- 4 whole plain white hamburger buns
- 2 tbsp yellow mustard
- 1 tbsp vegetable oil
Step by step instructions
Step 1: Prep the Onions and Beef
Slice onions as thin as possible using a sharp knife or mandoline. Divide the ground beef into four loose balls of equal size. Do not season the beef yet as salting early draws out moisture before cooking.
Step 2: Heat the Skillet
Heat a cast iron skillet or heavy griddle over high heat until it is very hot and just starting to smoke. Add vegetable oil and swirl to coat. A properly hot surface is essential for achieving the crispy crust that defines this burger.
Step 3: Smash with Onions
Place a handful of sliced onions on the hot surface and immediately set a beef ball on top of the onions. Smash firmly with a heavy spatula to press the onions into the patty. Season the top with salt and pepper and cook for 2 minutes.
Step 4: Flip and Add Cheese
Flip the patty onion side up so the embedded onions face up and are golden and crispy. Place a slice of American cheese on top immediately. Cook for 90 more seconds. Do not flip again after this point.
Step 5: Assemble and Serve
Lightly toast the white buns in the same skillet for 20 seconds. Spread yellow mustard on the top bun. Place the patty on the bottom bun with the onion side facing up and serve immediately while hot and crispy.
Easy substitutions
Missing an ingredient? Here are some swaps that work perfectly:
- American cheese → cheddar cheese or Velveeta slices
- yellow mustard → deli mustard or spicy brown mustard
- yellow onions → white onions for a sharper flavor
Common mistakes to avoid
Watch out for these pitfalls that can affect your results:
- Not heating the skillet hot enough before cooking prevents the onions and beef from crisping properly
- Making the beef balls too compact before smashing results in a dense and chewy patty
- Slicing onions too thick causes them to remain raw and crunchy instead of softening and caramelizing into the patty
Nutrition facts
Per serving: 580 calories, 36g protein, 32g carbs, 32g fat, 1g fiber.
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