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Smash Burgers

smash burger on a toasted bun, layered with crisp lettuce, cooked onion, melted American cheese, and a slice of fresh tomato
  • Serves:  4
  • Prep Time:  10 min
  • Cook Time:  5 min

Ingredients

  • 1 pound 80/20 ground beef
  • 2 tablespoons extra-virgin olive oil
  • 1 large sweet onion, chopped
  • ¼ cup yellow mustard
  • ¼ cup mayonnaise
  • ¼ cup ketchup
  • 2 teaspoons kosher salt
  • 4 slices American cheese
  • 4 sesame seed buns, halved
  • Shredded Iceberg lettuce
  • 1 large tomato, sliced

Method

  1. Divide the ground beef into 4 equal pieces and roll into balls. 
  2. Heat the oil in a cast iron skillet or flat-top grill over high heat. Once the oil is glistening, add half of the onion and cook, stirring often, until browned, about 4 minutes. Transfer to a plate and return the skillet over high heat. 
  3. Meanwhile, in a small bowl, combine the mustard, mayonnaise, ketchup, and the remaining onion. 
  4. Once the oil is smoking, working one at a time, add a beef ball and top it with a small square of parchment paper. Using a thick spatula, press the beef into a ⅛-inch-thin patty. (The beef may break apart around the edges–that's ok!) Remove the parchment, season the patty with ¼ teaspoon of the salt, and cook until browned, about 2 minutes. Flip the patty, season it with ¼ teaspoon of the salt, and top it with 1 tablespoon of the cooked onion and a slice of cheese. Cook for about 1 minute more, or until the cheese has melted. Transfer the burger to the bottom half of a bun and repeat with the remaining ingredients.
  5. Top each burger with the burger sauce, lettuce, tomato, and top half of a bun. Serve immediately.