French Dip Sliders Recipe

These French Dip Sliders feature thinly sliced roast beef and Swiss cheese nestled inside buttery, toasted slider buns, topped with caramelized onions infused with thyme and garlic. Served with a savory Au Jus sauce, they make a perfect appetizer or crowd-pleasing meal for any occasion.
Ingredients
- 15 ounces (12-count) package of slider buns (Martin’s brand Potato Rolls)
- 6 tablespoons unsalted butter, divided (4 tablespoons and 2 tablespoons)
- 3 cups thinly sliced yellow onion (from 1 large onion)
- 3 teaspoons fresh thyme leaves, divided (2 teaspoons and 1 teaspoon)
- 2 teaspoons grated garlic (from 2 cloves), divided in half
- 1/2 teaspoon granulated sugar
- 3/4 teaspoon salt, divided (1/2 teaspoon and 1/4 teaspoon)
- 1/4 teaspoon black pepper
- 1 1/2 pounds thinly sliced deli roast beef, cut into 1-inch wide strips
- 1/2 pound Swiss cheese, thinly sliced
- 10.5 ounces can Campbell’s French onion soup
- 1 1/2 cups water
- 1 ounce packet Au Jus mix
Instructions
- 1
Prepare the caramelized onions: In a large skillet over medium heat, melt 4 tablespoons of unsalted butter. Add the thinly sliced yellow onions and cook, stirring occasionally, until they soften and begin to caramelize, about 15-20 minutes. Stir in 2 teaspoons fresh thyme leaves, 1 teaspoon grated garlic, ½ teaspoon granulated sugar, ½ teaspoon salt, and ¼ teaspoon black pepper. Continue cooking for an additional 5 minutes until onions are deeply browned and flavorful. Remove from heat and set aside.
- 2
Prepare the slider buns: Preheat your oven to 350°F (175°C). Slice the slider buns horizontally, keeping the entire top and bottom halves intact. Place the bottom halves in a baking dish.
- 3
Assemble the sliders: Evenly layer the sliced roast beef over the bottom halves of the buns. Sprinkle the caramelized onions on top of the beef, then add the Swiss cheese slices over the onions. Cover with the top halves of the buns.
- 4
Make the butter topping: In a small bowl, mix the remaining 2 tablespoons of melted butter with 1 teaspoon of fresh thyme leaves and 1 teaspoon grated garlic. Brush this mixture generously over the tops of the slider buns to add flavor and help achieve a golden crust during baking.
- 5
Bake the sliders: Cover the baking dish with aluminum foil and bake in the preheated oven for 15 minutes. Remove the foil and bake an additional 5 minutes until the cheese is melted and the tops are golden and slightly crispy.
- 6
Prepare the Au Jus dipping sauce: In a saucepan, combine the Campbell’s French onion soup, water, and the 1-ounce packet of Au Jus mix. Heat over medium heat, stirring occasionally, until warmed through.
- 7
Serve the sliders hot with a side of the warm Au Jus sauce for dipping. Encourage dipping each slider to enjoy the classic French Dip flavor.
Cook it from the original
This recipe comes from busyrecipe.com. Their page has the author’s own photos, notes and tips — the best place to cook it from.
Open the recipe on busyrecipe.com