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French Onion Grilled Cheese Sliders

French onion grilled cheese sliders - featured image
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These French onion grilled cheese pull-apart sliders combine deeply caramelized onions and gooey cheese between buttery slider buns for the ultimate party snack. Easy to make and always a crowd-pleaser, they’re perfect for gatherings, game days, or cozy nights in.

Ingredients

Scale
  • 12 slider buns (soft and pull-apart, like Hawaiian or potato rolls)
  • 2 large yellow onions, thinly sliced
  • 6 tablespoons unsalted butter, divided
  • 1 tablespoon olive oil
  • Salt and black pepper, to taste
  • 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried thyme)
  • 1/4 cup beef broth
  • 1 1/2 cups Gruyère cheese, shredded (Swiss or Emmental can substitute)
  • 1 cup mozzarella cheese, shredded
  • 1 teaspoon Worcestershire sauce (optional)
  • 1/2 teaspoon garlic powder
  • Fresh parsley, for garnish (optional)

Instructions

  1. Heat 2 tablespoons butter and 1 tablespoon olive oil in a large skillet over medium heat. Add sliced onions, season with salt and pepper, and cook, stirring every 2-3 minutes, until golden and soft (about 20-25 minutes).
  2. Stir in thyme, beef broth, and Worcestershire sauce (if using). Simmer until most liquid evaporates (2-3 minutes). Remove from heat and let cool slightly.
  3. Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish. Slice slider buns in half horizontally, keeping tops and bottoms connected. Place bottom halves in the baking dish.
  4. Sprinkle half of the Gruyère and half of the mozzarella evenly over the bun bottoms.
  5. Spoon caramelized onions evenly over the cheese layer.
  6. Sprinkle remaining Gruyère and mozzarella over the onions.
  7. Place top halves of buns over the cheese and onions, gently pressing down.
  8. Melt remaining 4 tablespoons butter. Stir in garlic powder and a pinch of salt. Brush tops of buns generously with garlic butter.
  9. Cover dish with aluminum foil and bake for 15 minutes.
  10. Remove foil and bake another 7-10 minutes, until tops are golden and slightly crisp.
  11. Let sliders cool for 5 minutes before pulling apart. Garnish with chopped parsley if desired. Serve warm.

Notes

For best results, caramelize onions slowly over medium-low heat. Shred your own cheese for optimal melt. Keep slider buns connected for easy assembly. Prep onions ahead to save time. For gluten-free, use GF buns; for vegetarian, use vegetable broth and vegetarian Worcestershire. Let sliders rest 5 minutes before serving for best texture.

Nutrition

Keywords: French onion, grilled cheese, sliders, party food, pull-apart, appetizer, caramelized onions, cheese, easy recipe, crowd-pleaser

Find it online: https://bitematrix.com/french-onion-grilled-cheese-sliders-easy-pull-apart-party-recipe/