Classic Oklahoma Onion Smashburger
Experience the ultimate flavor and texture with this Classic Oklahoma Onion Smashburger, featuring thinly sliced onions cooked directly into the beef patty for an irresistibly caramelized and savory bite. This recipe delivers a juicy, cheesy burger with crispy edges, perfect for a satisfying meal.
Equipment
- Mandoline (optional)
- Cast-iron skillet or griddle
- Sturdy metal spatula
- Parchment paper
Ingredients
Main Ingredients
- 1 lb 80/20 ground chuck beef (about 450g)
- 2 yellow onions, thinly sliced (on a mandoline if possible)
- 4 slices American cheese (or cheddar/Monterey Jack)
- 4 burger buns (potato or brioche recommended)
- Salt and freshly ground black pepper to taste
- 1-2 tbsp oil or butter for cooking
Optional for serving
- - mustard
- - mayonnaise
- - dill pickle slices
- - French fries
Instructions
Cooking Steps
- Slice the yellow onions as thinly as possible, ideally using a mandoline, to ensure optimal caramelization and integration with the patty.
- Divide the ground beef into four loose, roughly 1/4-pound balls, handling the meat minimally to maintain tenderness.
- Heat a cast-iron skillet or griddle over medium-high heat until screaming hot, then add a tablespoon of oil or butter.
- Place a beef ball on the hot griddle and immediately pile a generous amount of thinly sliced onions directly on top.
- Using a sturdy metal spatula and parchment paper, firmly press down on the beef and onions to form a very thin patty, holding for about 10 seconds to maximize contact.
- Cook the first side for 1.5-2 minutes until crispy edges form and the onions are slightly charred and softened.
- Carefully scrape and flip the patty, then immediately place a slice of cheese on the cooked side.
- Continue cooking for another 1-2 minutes until the cheese is melted and the burger reaches your desired doneness.
- Optionally, toast the burger buns on the griddle or in a separate pan until golden and warm.
- Remove the cooked burger, place it on a toasted bun, and add desired condiments and toppings; serve immediately with sides like French fries.
Notes
For the best smashburger experience, ensure your cooking surface is extremely hot before adding the beef. Don't skip the parchment paper when smashing—it prevents sticking and ensures an even, thin patty. Serve with your favorite classic burger toppings!