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French Dip Sliders

French Dip Sliders

These French Dip Sliders are packed with savory roast beef, caramelized onions, and melted Swiss cheese, all baked into buttery slider buns for an irresistible appetizer or quick meal. Perfect for game day or any gathering!
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Prep Time 25 minutes
Cook Time 15 minutes
Total Time 40 minutes
Servings: 12
Cuisine: Chinese
Calories: 120
Ingredients Method Nutrition Notes

Ingredients
  

Sliders
  • 15 ounces slider buns (12-count package, e.g., Martin’s Potato Rolls)
  • 6 tablespoons unsalted butter (divided into 4 tablespoons and 2 tablespoons)
  • 3 cups thinly sliced yellow onion (from 1 large onion)
  • 3 teaspoons fresh thyme leaves (divided into 2 teaspoons and 1 teaspoon)
  • 2 teaspoons grated garlic (from 2 cloves, divided in half)
  • 0.5 teaspoon granulated sugar
  • 0.75 teaspoon salt (divided into ½ teaspoon and ¼ teaspoon)
  • 0.25 teaspoon black pepper
  • 1.5 pounds thinly sliced deli roast beef (cut into 1-inch wide strips)
  • 0.5 pound Swiss cheese (thinly sliced)
Au Jus Dipping Sauce
  • 10.5 ounces can French onion soup (e.g., Campbell’s brand)
  • 1.5 cups water
  • 1 ounce packet Au Jus mix

Method
 

Sliders
  1. Preheat oven to 350°F. Place the bottom half of your slider buns in a single layer into a 9x13 glass baking dish. Reserve the tops on a separate plate.
  2. In a large skillet on medium-high heat, add 4 tablespoons of unsalted butter. Once the butter has melted, add the thinly sliced yellow onions, 2 teaspoons fresh thyme leaves, 1 teaspoon grated garlic, granulated sugar, ½ teaspoon salt, and black pepper.
  3. Allow the onions to cook and caramelize for 10-15 minutes or until the onions have turned a golden brown and reduced by almost half. If your onions are browning too fast before softening, then you can turn the heat down to medium to allow the onions to caramelize evenly.
  4. Once the onions are done, add the strips of thinly sliced roast beef and gently toss the sliced roast beef with the caramelized onions until evenly distributed. Be sure to break up any large chunks of the roast beef. Remove from the heat.
  5. Top the bottom layer of slider buns with an even layer of the roast beef and onion mixture. Tongs work great for this step.
  6. Layer the sliced Swiss cheese over the entire surface of the roast beef.
  7. Top the Swiss cheese layer with the tops of the slider buns.
  8. Melt the remaining 2 tablespoons of unsalted butter in a small microwave-safe bowl for 30-40 seconds. Add the remaining 1 teaspoon of fresh thyme leaves, 1 teaspoon of grated garlic, and ¼ teaspoon salt. Stir to combine.
  9. Using a pastry brush, brush the tops of the slider buns with the melted butter mixture.
  10. Bake these French dip sliders for 15-20 minutes or until the tops of the buns are golden, and the cheese is melted. While your sliders are baking, you can make your au jus dipping sauce.
Au Jus Dipping Sauce
  1. In the skillet used to caramelize the onions on medium heat, add the French onion soup, water, and packet of au jus mix.
  2. Whisk to combine. Bring to a boil, then reduce the heat to low and simmer while the French dip sliders are baking. This should take 10-12 minutes.
  3. Remove the sauce from the heat and pour it into a serving bowl or small individual serving bowls.

Nutrition

Serving: 200gCalories: 120kcalCarbohydrates: 120gProtein: 120gFat: 120gSaturated Fat: 120gPolyunsaturated Fat: 120gMonounsaturated Fat: 120gTrans Fat: 120gCholesterol: 120mgSodium: 120mgPotassium: 120mgFiber: 120gSugar: 120gVitamin A: 120IUVitamin C: 120mgCalcium: 120mgIron: 120mg

Notes

Serve the French Dip Sliders warm with the au jus for dipping. These are best enjoyed immediately but can be kept warm for a short period.
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