Oklahoma fried onion burgers are packed with so much flavor, thanks to each patty being stamped with heaps of sweet and savory caramelized onions! With how easy to make and delicious they are, you won’t want burgers any other way.
Season the meat with salt and pepper and mix to combine.
Divide the ground beef evenly into 3-ounce portions and form into balls. Keep the meat chilled in the refrigerator until you're ready to smash the burgers.
Peel and slice the onion very thin. A mandolin works great!
Heat your griddle or a cast iron skillet over the stove to 400 degrees Fahrenheit.
Add 1 tablespoon of butter to the hot skillet. Place two balls of beef on the hot griddle or skillet. Quickly pile on a handful of sliced onions on top of each burger. Smash them using a burger press or a flat spatula. Flatten the patty as thin as you can while pressing the onions into the meat.
Cook for about 3-4 minutes then flip both patties with a metal spatula. Make sure to scrape up the golden crusty layer that has formed on the burger underneath.
Place a slice of cheese on top of one of the patties. Allow the burgers to cook an additional 2-3 minutes.
Butter both sides of each bun. Toast the inside of each bun on a griddle or skillet for about 20 seconds or until golden brown.
Assemble the hamburger by adding your favorite condiments then layer on the two patties.
Top it with the other half of your toasted bun. Repeat this process for all of the burgers and enjoy!