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a plate filled with small french dip sandwiches. One sandwich is on top of the others.
5 from 5 votes

French Dip Sliders

French dip sliders are filled with savory roast beef, melty provolone, and rich caramelized onions in bite-size form!
Author Diana
Servings 12 sandwiches
Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes

Ingredients

For the Caramelized Onions:

  • 1 tablespoon olive oil
  • 3 tablespoons butter
  • 2 medium yellow onions thinly sliced
  • 2 sprigs of thyme whole
  • ¼ teaspoon salt
  • ¼ teaspoon ground black pepper

To Assemble the Sliders:

  • 12 Hawaiian sweet rolls
  • 2 tablespoons dijon mustard
  • ¼ cup mayonnaise
  • 12 slices provolone cheese
  • 1 pound thin sliced deli roast beef
  • 2 tablespoons butter + more for buttering the pan
  • 2 tablespoons dried onion soup mix
  • 1 packet au jus made according to package instructions
  • parsley for garnish

Instructions

  • In a skillet, heat olive oil and melt butter and add onions and thyme. Saute (keep stirring) until caramelized. This takes 15-20 minutes. Remove the thyme sprigs, season with salt and pepper, and remove from heat.
  • Lightly butter a 7x11” pan with softened butter, and preheat the oven to 350°F/180°C.
  • Slice the rolls lengthwise leaving them intact, and place the bottom half in the buttered pan. Spread the mayo and mustard
  • Then add a layer of cheese (use half of the cheese), all of the roast beef, and the caramelized onions. Layer the remaining cheese, and cover with the top buns over the cheese.
  • Brush the buns with melted butter, and sprinkle with dried onion mix. Bake in the oven covered with foil for 15 minutes, then uncover and bake for 5 more minutes or until the tops are golden brown.
  • Prepare the au jus gravy as you wait for the sliders to bake, and serve on the side. Garnish with parsley.

Notes

  • A 7x11-inch baking pan is the perfect size for a package of King's Hawaiian rolls. If you have a standard Pyrex baking dish, it's probably the right size. You can also bake sliders in a 9x9 pan, you just need to arrange them differently.
  • Switch up the Cheese: Try swiss or mozzarella cheese instead of provolone.
  • Slice With a Serrated Knife: Hawaiian rolls are very soft, so it's easiest to slice them using a serrated knife. A straight-edged knife will crush them. You can also put the rolls in the freezer for 15 minutes before slicing to make it even easier!
  • Can't Find Hawaiian Rolls? Try using packaged soft dinner rolls instead.
  • Variations: Try these sandwiches with horseradish sauce instead of the mayo/mustard spread. You might also like to add some banana peppers, or try french fried onions instead of (or in addition to) caramelized onions.
  • Instead of dried onion soup mix on top of the sliders, try Everything Bagel Seasoning, or sesame seeds instead!
  • Instead of deli roast beef, try this recipe with thinly sliced leftover prime rib or homemade roast beef. 
  • To Store: These sliders are best when you eat them shortly after removing them from the oven. If you have leftovers, store them in the fridge for up to 2 days. Reheat in the oven or air fryer, just until they're warm again.

Nutrition

Calories: 298kcal | Carbohydrates: 18g | Protein: 17g | Fat: 18g | Saturated Fat: 8g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 5g | Trans Fat: 0.2g | Cholesterol: 59mg | Sodium: 1036mg | Potassium: 176mg | Fiber: 1g | Sugar: 5g | Vitamin A: 326IU | Vitamin C: 19mg | Calcium: 260mg | Iron: 1mg