French Onion Roast Beef Sliders

These French Onion Roast Beef Sliders are my favorite kind of comfort food—easy to make, packed with flavor, and always a crowd-pleaser. If you’re craving something warm and cheesy with that classic beef roast flavor, this recipe checks all the boxes.

You’ve got thin-sliced roast beef, sweet caramelized onions, and provolone all stacked inside soft Hawaiian rolls. Then there’s a layer of French onion dip that melts into everything while it bakes. And the best part? The buttery garlic topping and homemade au jus for dipping. Yes, it’s as good as it sounds.

I love making these for family movie nights or when I need a quick dinner that feels a little special without much effort. They also make great party food—just set them out with the dipping sauce and watch them disappear.

Why You’ll Love This Recipe

• Fast and fuss-free – No need to roast a whole beef. Grab some quality deli roast beef and let the oven do the rest.
• Perfect for sharing – Whether it’s game day, a potluck, or dinner with picky eaters, these sliders are always a hit.
• Make-ahead friendly – You can caramelize the onions and prep the sliders a few hours ahead. Just pop them in the oven when you’re ready.
• Cheesy, toasty, and full of flavor – That combo of melty provolone, French onion dip, and buttery garlic topping? Next-level comfort.
• That au jus though – A quick stovetop sauce made with pantry staples adds a savory punch that pulls it all together.

Ingredients You’ll Need

For the Sliders:

• 1 large yellow onion, thinly sliced
  Slow-cooked until caramelized—this adds that sweet, rich flavor you expect from French onion anything.
• 5 tablespoons butter, divided
  You’ll use this to caramelize the onions and brush over the tops for that golden finish.
• ¼ teaspoon sugar
  Just enough to help the onions caramelize nicely.
• 12 Hawaiian sweet roll slider buns
  Their soft, slightly sweet flavor works perfectly here. King’s Hawaiian is the classic, but any soft dinner rolls will do.
• ½ cup French onion sour cream dip
  This adds a creamy, savory layer without extra work. You can use store-bought or homemade if you’re feeling fancy.
• 1 pound deli roast beef
  Ask for it sliced thin. You can also use leftover beef roast if you have it on hand—just warm it up a bit before layering.
• 10 slices provolone cheese
  Melty and mild, provolone pairs well with the onions and beef. Swiss or mozzarella work too.
• 2 garlic cloves, minced
  For the buttery topping—fresh garlic gives the best flavor.
• 1 tablespoon parsley, finely chopped
  Optional, but adds a little color and freshness to the tops.

For the Au Jus Dipping Sauce:

• 1 cup beef broth
  Go for low-sodium if you’re using soy sauce or deli meat with salt.
• ¼ cup red wine
  Adds depth. Don’t worry—it simmers off. You can also use grape juice or just more broth.
• 1 tablespoon Worcestershire sauce
  For that savory, umami kick.
• 1 tablespoon soy sauce
  Adds salt and richness to balance the beefiness.

How to Make French Onion Roast Beef Sliders

1. Preheat the oven

Set your oven to 350°F so it’s ready when the sliders are assembled.

2. Caramelize the onions

In a skillet over medium heat, melt 3 tablespoons of butter. Add the sliced onions and sprinkle with ¼ teaspoon sugar.
Cover the pan and cook, stirring occasionally, for 15 to 20 minutes, until the onions are soft and golden brown.

🔥 Tip: If the onions start to brown too quickly, lower the heat. Slow and low is the way to go here.

3. Prep the rolls

While the onions are cooking, take your Hawaiian rolls and slice them in half horizontally—but keep the sheet of rolls intact. Place the bottom half on a parchment-lined baking sheet.

4. Layer it up

Spread the bottom half of the rolls with French onion dip. Then layer on the roast beef, followed by provolone cheese slices, and finish with the caramelized onions. Place the top half of the buns over everything.

5. Make the buttery topping

Melt the remaining 2 tablespoons of butter and stir in the minced garlic and chopped parsley.
Brush this mixture all over the tops of the buns. Be generous—it gives that golden, garlicky finish everyone loves.

6. Bake

Pop the sliders in the oven and bake for 10 to 15 minutes, or until the cheese is melted and the tops are slightly toasted.

🧀 Tip: If the tops start browning too fast, just tent a piece of foil loosely over them.

7. Make the au jus

While the sliders bake, add the beef broth, red wine, Worcestershire, and soy sauce to a small pot.
Simmer on low heat for about 10 minutes until warm and slightly reduced. That’s your dipping magic right there.

8. Serve and dip

Take the sliders out, slice them up, and serve warm with little bowls of au jus on the side for dipping. Trust me—don’t skip it.

Tips & Variations

• Caramelize the onions slowly
  Don’t rush it. Let them cook low and slow until golden and sweet. That flavor is what makes these sliders stand out.
• Use any melty cheese
  Provolone is classic, but mozzarella, Swiss, or even white cheddar works great.
• Prep ahead for parties
  Assemble the sliders earlier in the day, then bake just before serving. You can also keep them warm in a low oven, loosely covered with foil.
• No French onion dip?
  Mix sour cream with a little onion powder and garlic powder if you need a quick sub.
• Switch up the style
  If you’re into sliders like these, try a few other flavor combos:
  – Italian Roast Beef Sliders with pepperoncini and mozzarella
  – Roast Beef Cheese Sliders with horseradish mayo and cheddar

Serving Suggestions

• Make it a meal – Pair these sliders with a big green salad, some oven-roasted veggies, or even baked fries for a full dinner that doesn’t feel like a snack.
• Keep it casual – For parties or game day, set the sliders out with small bowls of au jus and let everyone dip as they go. Add a veggie tray or chips on the side, and you’re set.
• Soup and sliders night – These go perfectly with a cozy bowl of soup. Try a classic tomato soup, creamy potato, or even French onion to match the flavors.
• Lunchbox-friendly – Leftovers? Wrap a couple in foil and warm them up for a quick, satisfying lunch the next day. They reheat surprisingly well.

Frequently Asked Questions

These French Onion Roast Beef Sliders are one of those recipes you’ll come back to again and again. They’re easy enough for a weeknight, crowd-pleasing for parties, and full of that cozy, savory flavor we all crave when it’s time for comfort food.

If you try them, don’t forget to serve them with the au jus—it really ties everything together. And if you’re looking for more slider ideas, check out the Italian Roast Beef Sliders or Roast Beef Cheese Sliders next.

Happy cooking, and save me one if you can.