Caramelized Onion & Swiss Beef Sliders

These crowd-pleasing cheeseburger sliders feature Swiss cheese, spicy mustard, pickles and delicious caramelized onions.

Makes: 12 sliders
Prep Time: 25 minutes
Cook Time: 55 minutes
Total Time: 1 hour 20 minutes
Recipe Created By: Jessi Heggan
Featured In: Tennessee Home & Farm

Ingredients

For the Caramelized Onions

  • 1 large yellow onion, chopped (approximately 2 cups)
  • 1 tablespoon unsalted butter
  • 1 tablespoon olive oil
  • 1 teaspoon kosher salt

For the Burgers

  • 1 ½ pounds ground beef
  • 1 teaspoon kosher salt
  • 1 teaspoon black pepper
  • ½ teaspoon granulated garlic
  • 6 slices Swiss cheese, cut in half

For the Slider Assembly

  • 12 slider buns
  • Arugula (optional)
  • Spicy mustard (optional)
  • Sliced pickles (optional)

Instructions

  1. Heat a large pan to medium heat and add butter and oil. Add onions and cook on medium-low heat for 5 minutes or until onions are starting to soften. Add salt and continue to cook for 25 to 30 minutes or until onions are slightly browned and caramelized, stirring occasionally.
  2. Preheat oven to 425 degrees. Place a wire cooling rack on top of a baking sheet lined with parchment paper (to catch the grease from the burgers).
  3. Let the onions cool a bit, and then add them to a large bowl along with the ground beef, salt, pepper and garlic. Divide into 12 small burger patties.
  4. Place the burgers on the wire rack and bake for 15 to 20 minutes. Remove from oven and top with Swiss cheese. Turn on broiler and melt cheese for about 2 minutes.
  5. Place the burgers on the slider buns and top with arugula, spicy mustard and pickles if desired. Serve immediately.

Tips & Notes

If you wish to top the burgers with more caramelized onions, double the recipe and put half in the burger mixture and the other half in another container for later use.

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