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Oklahoma Onion Smashburgers Recipe

Oklahoma Onion Smashburgers Recipe

This Oklahoma Onion SmashBurger is a quick, flavorful burger made with thinly sliced onions smashed into seasoned beef patties. Cooked on high heat and finished with melted cheese and a tangy sauce, it’s simple, crispy, and satisfying.
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Prep Time 20 minutes
Cook Time 10 minutes
Total Time 30 minutes
Servings: 4
Calories: 780
Ingredients Equipment Method Notes

Ingredients
  

  • 1.5 lb ground beef 80/20
  • 2 large onions thinly sliced
  • Pickles
  • 12 slices American cheese
  • Brioche buns
  • Salt
For the burger sauce
  • 1/2 cup mayo
  • 3 tbsp ketchup
  • 2 tbsp yellow mustard
  • 1.5 tbsp sweet relish
  • 1.5 tbsp hot sauce
  • 1 tsp black pepper
  • 1 tsp kosher salt

Equipment

  • Griddle or large skillet
  • Mandolin slicer or sharp knife
  • Mixing bowl
  • Spatula
  • Tongs

Method
 

  1. Slice the onions very thin using a mandolin or sharp knife, then toss them with salt and let them sit before squeezing out the excess moisture.
  2. Divide the ground beef into equal portions and roll them into balls, then chill them briefly so they hold their shape when cooking.
  3. Heat a griddle over high heat until very hot, adding a small amount of oil if needed to prevent sticking.
  4. Mix all the burger sauce ingredients in a bowl until smooth and well combined, then set it aside for later use.
  5. Place the beef balls onto the hot griddle, top each with a generous handful of onions, and smash them down as thin as possible.
  6. Let the patties cook undisturbed until a crust forms, then flip them carefully and season again before adding cheese on top.
  7. Stack and steam the buns briefly on the griddle so they soften and warm through.
  8. Assemble the burgers by spreading sauce on the buns, adding pickles, placing the patties on top, and closing with the top bun before serving.

Notes

Thinly sliced onions are smashed directly into the beef, creating a caramelized, flavorful crust.
High heat is essential to achieve crispy edges and proper browning on the patties.
The burger cooks very quickly, usually within a few minutes per side.
American cheese melts smoothly and adds a classic creamy texture.
A simple burger sauce enhances flavor with tangy, sweet, and slightly spicy notes.