25-Minute Cheeseburger Sliders with Gruyere & Onions
Juicy, savory, and perfectly indulgent. We’ve swapped standard cheddar for melted Gruyère and topped these sliders with sweet caramelized onions for a deeper, richer flavor profile. Drizzled with our tangy special sauce, they hit every note—salty, sweet, and totally addictive.
Servings: 16 sliders
Calories: 293kcal
Equipment
Ingredients
For the burger sauce
- ½ cup mayonnaise
- 1 Tbsp Dijon mustard
- 2 tsp Ketchup
- 1 tsp pickle juice
For the sliders
- 2 lbs 80/20 ground beef
- Kosher salt
- Freshly ground black pepper optional
- Yellow mustard about ¼ cup, divided
- Caramelized onions optional
- 1 cup Gruyere cheese grated or thinly sliced
- 16 slider buns or Hawaiian rolls
Instructions
- Make the burger sauce. In a small bowl, whisk together ½ cup mayo, 1 Tbsp Dijon mustard, 2 tsp Ketchup, and 1 tsp pickle brine. Set aside.
- Form the slider patties. I recommend using a kitchen scale to weigh equal portions of ground beef. Place plastic wrap on top of the scale for easy clean up, then portion into 2oz patties. Use your hands to gently form into round discs about ¼-½-inch thick.
- Cook the sliders. Preheat a large griddle or cast-iron skillet over medium-high heat until very hot, about 5 minutes. Working in batches, place the patties on the griddle, spacing them about 2 inches apart. Immediately smash with a spatula, season with about ½ tsp kosher salt and black pepper, then spread about 1 tsp yellow mustard over each patty. Cook for about 1 minute, until well browned, before flipping.
- Flip the sliders. Once you've flipped each patty, place a heaping tablespoon of caramelized onions on top. Add a few thin slices of Gruyere or about 2 tsp of grated cheese. Immediately place the top half of the slider bun on each patty. Next, add the bottom half, cut side down, right on top. Sliders should cook for 2 minutes on the second side for medium rare. Cook further if desired.
- Assemble, then serve. Use the spatula to remove each slider, being sure to spoon on some sauce to the bottom bun before assembling. Serve immediately with any additional burger toppings you like!
Notes
- Slider sauce can be made up to 3 days in advance.
- Unlike a steak, burgers and sliders should be seasoned just before cooking.
- If you're wondering how to caramelize onions at home, I got you!
Nutrition
Calories: 293kcal | Carbohydrates: 17g | Protein: 16g | Fat: 18g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 6g | Trans Fat: 1g | Cholesterol: 60mg | Sodium: 303mg | Potassium: 192mg | Fiber: 0.5g | Sugar: 5g | Vitamin A: 90IU | Vitamin C: 1mg | Calcium: 100mg | Iron: 1mg
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