(More) Ultimate(est) Perfect Sliders

By first caramelizing onions in the skillet and removing them, you build up a patina of sticky, browned onion juice that fuses itself to the beef when you smash the patties into it.

Note: if you like seasoned salt (like Lawry's), you can replace the salt and pepper with it.

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(More) Ultimate(est) Perfect Sliders

About This Recipe

Yield:makes 4 sliders
Active time:20 minutes
Total time:20 minutes
Special equipment:clean kitchen towel
This recipe appears in: The Burger Lab: The (More) Ultimate(est) Perfect Sliders
Rated:

Ingredients

  • 1 tablespoon vegetable oil
  • 2 large onions, split in half from pole to pole and sliced thinly from pole to pole (About 2 cups)
  • Kosher salt
  • 1 pound freshly ground beef, divided into eight 2-ounce portions
  • Freshly ground black pepper
  • 8 small hamburger buns
  • 4 slices American cheese, split in half
  • 16 dill pickles slices
  • Mustard, ketchup, and mayonnaise, as desired

Procedures

  1. 1

    Heat vegetable oil in 10-inch cast iron or nonstick skillet over medium-high heat until shimmering. Add half of onions and pinch of salt and cook, stirring frequently, until light golden brown, about 3 minutes. Add 2 tablespoons water and continue to cook, stirring frequently, until onions are deep brown and thin layer of browned onion juice coats bottom of pan, about 4 minutes longer. Remove pan from heat and transfer onions small bowl. Add raw onions to cooked onions and toss thoroughly to combine.

  2. 2

    Return skillet to heat and place four beef balls evenly over surface. Using wide, flat spatula, smash balls into circles approximately four inches wide and 1/4-inch thick. Reduce heat to low. Season with salt and pepper (or seasoned salt, if desired, see note). Divide half of onion mixture evenly on top of each patty and press into meat with bottom of spatula. Cook for 1 minute. Carefully flip patties so that onions are in contact with skillet

  3. 3

    Place bottom buns upside down on top of patties and top with top buns. Place clean folded kitchen towel on top of burgers so that all burgers are covered and towel drapes over edges of pan (be careful to keep pan away from direct flame). Continue to cook until burgers are cooked through and buns are fully softened with steam, about 2 minutes.

  4. 4

    Remove towel. Remove top and bottom buns from burgers. Place 1/2 slice cheese on top of each patty and return top bun to burgers. Cover with kitchen towel and continue to cook until cheese is fully melted, about 1 minute longer. Meanwhile, place 2 pickle slices and condiments as desired on bottom bun. Lift towel. Transfer burgers, onions, cheese, and top buns to bottom buns. Serve and repeat steps 2 through 4 with remaining burgers.

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