The best Oklahoma smash burgers with onions cooked in them. Let’s make onion smash burgers with a cast iron skillet on the stove (or use your Blackstone griddle grill!) | sipbitego.com
½mediumonionhalved and sliced very thin with a mandoline
1tspsalt and pepperor to taste
1LBground beefdivided in quarters and formed into round disc patties
4hamburger buns
Instructions
Preheat a large cast iron skillet or Blackstone grill to high on the stove. Add olive oil. Set aside a piece of parchment paper a bit larger than the size of the onion smash burger patties.
Once olive oil is hot and shiny, add some thinly sliced onions to the pan in the size of a hamburger patty. Quickly add a burger patty on top, then add the parchment paper on top of the burger. Smash the burger down with a large spatula (metal or something hard works best). Get it as thin as possible, less than 1 inch thick is ideal. Repeat for all the burgers one at a time or at the same time.
Cast iron sear Oklahoma smash burgers for a couple minutes, until onions brown around the edges.
Flip the burgers and finish searing smash burgers a couple minutes until they reach an internal temperature you desire for cooking onion burgers. We took the burgers out of the pan when they reached about 120-125 degrees F. Because they are so thin, they continued cooking and for us and turned out a completely perfect medium done smash burger. (Optional - Add a slice of cheese after you flip the burgers and remove from the pan once cheese is melted)
Assemble the onion smashed burgers by placing them on toasted bottom bun and top buns and enjoy!
Outdoor Flattop / Blackstone Griddle Instructions
Preheat flattop grill to high and set aside a piece of parchment paper.
Add oil to grill. Once it's hot and shines, add ¼ of the onions for each hamburger patty. Add burger balls on top.
Add parchment paper on top of burgers and smash the burgers down with a large spatula as thin as possible, ~1".
Cook until onions are browned.
Flip burgers + finish cooking a 2-5 minutes until done. I take mine off around 125'F.