How to Make the Perfect Classic Oklahoma Fried Onion Burger
American · Easy · 25 min · 4 servings
A smash-style burger pressed into a mountain of thinly sliced onions that caramelize right into the patty. This Depression-era Oklahoma staple delivers intense savory flavor in every bite.
Why this recipe works
This Classic Oklahoma Fried 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 520 calories with 28g 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 lb 80/20 ground beef
- 2 large yellow onions thinly sliced
- 1 tsp kosher salt
- 0.5 tsp black pepper
- 4 slices American cheese
- 4 tbsp yellow mustard
- 4 tbsp mayonnaise
- 4 whole soft hamburger buns
Step by step instructions
Step 1: Portion and prep the beef
Divide the ground beef into 4 equal balls of about 6 ounces each. Do not overwork the meat. Season each ball generously with salt and pepper on all sides. Set aside at room temperature while you prep the onions.
Step 2: Pile onions onto the griddle
Heat a cast iron skillet or griddle over high heat until smoking hot. Place a large mound of sliced onions directly on the dry griddle. Set one beef ball on top of each onion mound and immediately smash it down hard with a spatula, pressing the onions into the patty.
Step 3: Cook the first side
Let the patty cook undisturbed for 3 to 4 minutes. The onions will begin to steam and caramelize against the hot griddle while the beef develops a deep brown crust. Do not move or press the burger again during this time.
Step 4: Flip and add cheese
Carefully scrape and flip the patty so the onion side faces up. Immediately lay a slice of American cheese over the onions. Cook for 1 to 2 more minutes until the cheese melts fully and the bottom of the patty is cooked through.
Step 5: Toast buns and assemble
Toast the buns cut-side down on the same griddle for 30 seconds. Spread mustard on the bottom bun and mayonnaise on the top bun. Place the burger patty onion-side up on the bottom bun and close with the top bun. Serve immediately.
Easy substitutions
Missing an ingredient? Here are some swaps that work perfectly:
- yellow onions → white onions for a sharper more pungent flavor
- American cheese → white cheddar for a sharper taste
- 80/20 ground beef → 85/15 ground beef for a slightly leaner patty
Common mistakes to avoid
Watch out for these pitfalls that can affect your results:
- Not getting the griddle hot enough before adding the onions and beef
- Pressing the burger more than once which squeezes out all the juices
- Slicing the onions too thick so they do not soften properly during cooking
Nutrition facts
Per serving: 520 calories, 28g protein, 32g carbs, 30g fat, 2g fiber.
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