Oklahoma Fried Onion Burgers are a famous American diner-style burger that originated during the Great Depression in Oklahoma. To stretch expensive beef further, cooks pressed lots of thinly sliced onions directly into the burger patty while it cooked. The onions caramelize on the griddle, creating a juicy, flavorful burger with crispy edges and sweet onion flavor.
⏱️ Recipe Time
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Prep Time: 10 minutes
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Cook Time: 10–12 minutes
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Total Time: 20 minutes
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Servings: 4 burgers
🧰 Equipment
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Cast iron skillet or griddle
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Spatula
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Sharp knife or mandoline slicer
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Mixing bowl
🥩 Ingredients
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1 lb ground beef (80/20 works best)
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2 large yellow onions, very thinly sliced
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4 burger buns
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4 slices American cheese (optional but traditional)
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1 tablespoon butter
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Salt and black pepper, to taste
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Pickles, for serving (optional)
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Mustard or mayo (optional)
📝 Ingredient Notes
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Very thin onions are important so they cook quickly and caramelize.
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Use high-fat ground beef to keep the burgers juicy.
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American cheese melts perfectly and is commonly used in classic diners.
👩🍳 Instructions
1. Prepare the Onions
Peel and slice the onions very thinly using a sharp knife or mandoline. Set aside.
2. Divide the Beef
Divide the ground beef into 4 loose balls. Do not compact them too tightly.
3. Heat the Skillet
Place a cast iron skillet or griddle over medium-high heat until very hot.
4. Add the Beef
Place a beef ball on the skillet. Immediately pile a handful of sliced onions on top of the meat.
5. Smash the Burger
Using a spatula, firmly press the onions into the meat, smashing the burger thin so the onions stick to it.
6. Season
Sprinkle salt and pepper over the burger while it cooks.
7. Cook and Flip
Cook for 3–4 minutes until the onions become golden and crispy. Flip the burger so the onion side is down.
8. Add Cheese
Place a slice of American cheese on top and cook for another 1–2 minutes until melted.
9. Toast the Buns
Spread butter on the buns and toast them lightly on the skillet.
10. Assemble
Place the burger on the bun and add pickles, mustard, or mayo if desired.
🍽️ Nutrition (Approximate per burger)
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Calories: 420 kcal
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Protein: 25 g
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Carbohydrates: 28 g
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Fat: 24 g
⭐ Tips for the Best Onion Burgers
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Slice onions paper-thin so they caramelize instead of staying raw.
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Smash the burger immediately after placing it on the skillet.
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Use a cast iron pan for the best crispy crust.
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Avoid flipping too early to allow onions to caramelize properly.
🔄 Variations
1. Double Oklahoma Burger
Stack two onion burgers with extra cheese.
2. Spicy Version
Add jalapeño slices or hot sauce.
3. BBQ Onion Burger
Top with barbecue sauce and crispy bacon.
4. Mushroom Onion Burger
Add sautéed mushrooms with the onions.
