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A pyramid stack of gourmet beef sliders on a wooden cutting board.

Gourmet Beef Sliders

Course: American, Entree / Cookout
Cuisine: American
Keyword: burger, how to make aioli, party food recipes
Prep Time: 20 minutes
Cook Time: 45 minutes
Total Time: 1 hour 5 minutes
Servings: 4 people
Calories: 568kcal
Gourmet Beef Sliders are amazing with caramelized onions, fresh sirloin beef, rosemary aioli, and melty provolone cheese! A guaranteed hit!
Print Recipe


  • Gas or charcoal grill, indoor grill, or cast-iron skillet (for the stove)


  • 1 cup rosemary aioli
  • 2 tbsp unsalted butter
  • 3 large onions sliced
  • lbs ground sirloin 85%..formed into 2.5 ounce patties (for sliders)
  • Kosher salt and fresh ground black pepper
  • 8 slices provolone
  • slider buns


Do Ahead

  • Make the rosemary-garlic aioli and refrigerate (covered) for up to 1 day.

Make the Caramelized Onions

  • In a large skillet, melt the butter over medium heat.
    2 tbsp unsalted butter
  • Add the onions and cook until caramelized and browned, about 35 to 40 minutes. A pinch of salt and pepper and stir. Set aside, but keep warm.
    3 large onions

Prep and Cook the Burgers

  • Salt and pepper each side of the patties.
    1½ lbs ground sirloin, Kosher salt and fresh ground black pepper
  • Press an indention with your fingers/thumbs in the center of the patty.
  • Heat your grill to medium heat, or heat your skillet to medium heat.
  • If using your cast-iron skillet, add 1 tablespoon of oil.
  • Once fully heated, add the patties. Cook on one side for about 4 minutes. Then flip. Cook on the other side for about 4 minutes.
  • In the last minute, add the cheese.
    8 slices provolone
  • Meanwhile, slice the buns, butter them, and place under the broiler for about 3 minutes (keep an eye on them! Time varies depending on oven).
    slider buns
  • Remove burgers from heat source.
  • Smear the aioli on each bottom bun. Place the burger on the aioli and then top it with a pile of warm caramelized onions. Place the top bun on the slider and serve at once.
    1 cup rosemary aioli


See the video near the top of the blog post for visual guidance. If you like the video, please subscribe to our YouTube channel
The rosemary-garlic aioli can be made a day in advance. Keep covered in the fridge and stir again before stirring. The onions can be made several hours in advance. Reheat on the stove over medium-low heat until sizzling. 


Calories: 568kcal | Carbohydrates: 13g | Protein: 48g | Fat: 24g | Saturated Fat: 8g | Cholesterol: 184mg | Sodium: 610mg | Potassium: 746mg | Fiber: 2g | Sugar: 7g | Vitamin A: 338IU | Vitamin C: 8mg | Calcium: 471mg | Iron: 4mg