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French Onion Philly Cheesesteak Sliders

French Onion Philly Cheesesteak Sliders - featured image
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These French Onion Philly Cheesesteak Sliders combine caramelized onions, juicy steak, and gooey cheese in buttery slider buns for the ultimate party appetizer or family-friendly dinner. They’re quick, customizable, and guaranteed to disappear fast at any gathering.

Ingredients

Scale
  • 12 slider buns (Hawaiian rolls recommended)
  • 1 pound ribeye steak, thinly sliced
  • 2 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter, divided
  • 1 tablespoon olive oil
  • 1/4 cup beef broth (optional, for deglazing)
  • 1 tablespoon Worcestershire sauce
  • 8–10 slices provolone cheese
  • 2 cloves garlic, minced
  • 1 teaspoon fresh thyme (optional)
  • Salt and black pepper, to taste
  • 1/2 cup shredded Gruyère cheese (optional, for topping)
  • Optional: gluten-free slider buns, vegan cheese, dairy-free butter, or sautéed mushrooms for dietary adaptations

Instructions

  1. Slice 2 large yellow onions thinly. Heat 2 tablespoons butter and 1 tablespoon olive oil in a large skillet over medium-low heat. Add onions and a pinch of salt. Cook, stirring occasionally, for 20-25 minutes until deeply golden and soft. Add a splash of beef broth if onions start sticking.
  2. Once onions are caramelized, add 1/4 cup beef broth and 1 tablespoon Worcestershire sauce. Stir, scraping up browned bits. Let most liquid cook off. Add fresh thyme if using. Transfer onions to a bowl and wipe out skillet.
  3. Increase heat to medium-high. Add remaining 2 tablespoons butter to skillet. Add thinly sliced ribeye, season with salt and pepper. Sauté for 2-3 minutes until just cooked through. Work in batches if needed. Return onions to pan, toss together, and remove from heat.
  4. Preheat oven to 350°F (175°C). Without separating slider buns, slice them in half horizontally. Place bottom buns in a 9×13-inch baking dish. Lay half the provolone slices over the buns.
  5. Spread steak and onion mixture evenly over cheese. Layer remaining provolone (and Gruyère, if using) on top. Cap with top buns.
  6. In a small saucepan, melt 2 tablespoons butter. Stir in 2 minced garlic cloves (or 1/2 teaspoon garlic powder) and a pinch of thyme. Brush mixture over tops of buns.
  7. Cover dish with foil and bake for 15 minutes. Remove foil and bake another 5-8 minutes until tops are golden and cheese is bubbling.
  8. Let sliders cool for a couple of minutes before slicing. Use a sharp knife or metal spatula to separate. Serve warm.

Notes

Caramelize onions slowly for best flavor. Slice steak thinly against the grain for tenderness. Use a slotted spoon to transfer filling if juicy, to avoid soggy buns. Cheese can be swapped for Swiss, mozzarella, or Gruyère. For make-ahead, caramelize onions and cook steak up to 2 days in advance. Sliders can be assembled and refrigerated up to 8 hours before baking.

Nutrition

Keywords: French onion, Philly cheesesteak, sliders, party appetizer, game day, beef, caramelized onions, cheese, easy recipe, crowd-pleaser

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