Roast Beef Sliders

There’s something undeniably comforting about a warm, cheesy slider, and this Roast Beef Slider Recipe takes that comfort to a whole new level. It’s everything you love about a hearty roast beef sandwich but conveniently bite-sized.

What sets these sliders apart is the balance of flavors and textures.

The tender roast beef, savory caramelized sweet onions, and creamy horseradish sauce come together beautifully with the gooey melted cheese and buttery Hawaiian sweet rolls.

It’s the perfect marriage of savory, sweet, and just a hint of spice. 

(full list of ingredients can be found in the recipe card at the bottom of this post)

• Deli Roast beef OR Leftover Roast Beef: Sliced roast beef from the grocery store is a great option for convenience, but using your own roast beef works the best. You can also use leftover prime rib from my prime rib recipe!
• Yellow Onion: Caramelized for a touch of sweetness and depth that pairs perfectly with the beef.
• Worcestershire sauce: A must-have for adding bold, umami-packed flavor to the beef. I also use this in my reuben sliders for a little extra flavor.
• Onion powder & garlic powder: Simple spices that enhance the savory notes of the roast beef without overpowering it.
• Butter, garlic, parsley: These create a buttery topping that soaks into the rolls and makes them golden brown and irresistible.
• Mayo, Dijon mustard, creamy horseradish sauce: A creamy, tangy trio that adds richness and a little heat to balance the sweet rolls and savory beef.
• Mozzarella and Smoked Gouda: The perfect combination of creamy and smoky, melting beautifully into the layers of roast beef. You can also use cheddar cheese or provolone if you prefer.
• Sweet Hawaiian rolls: Soft, fluffy, and slightly sweet, these rolls hold everything together while adding their own distinct flavor. If you want to go the homemade route, use my brioche dinner rolls or homemade hawaiian rolls for the bread! 

Substitutions and Variations 

Add sesame seeds or poppy seeds on top! After brushed the top buns with the garlic butter, sprinkle a generous amount! 

Switch up the cheese: you can use slices of provolone cheese, pepper jack cheese, or even cheddar cheese.

Make ahead: ​this easy recipe is perfect for busy weeknights. You can even prep ahead by making the filling ahead of time and assembling when you’re ready to heat everything in the oven! 

How to Make Roast Beef Sliders

Step 1: Prep the Rolls: Preheat your oven to 350°F. Line a baking sheet with parchment paper. Slice the Hawaiian rolls in half using a serrated knife and place the bottom half on a parchment-lined baking sheet. Bake for 5-8 minutes until golden brown.

Step 2: Cook the Filling: Heat a drizzle of olive oil in a skillet over medium heat. Add the roast beef, Worcestershire sauce, onion powder, and garlic powder. Cook for 2-3 minutes and set aside. Add more oil if needed, then cook diced onions until softened. Stir in butter and garlic, cooking until caramelized. Toss in parsley and remove from heat.

Step 3: Assemble the Sliders: Mix mayo, Dijon mustard, and horseradish together in a small bowl and spread on the top and bottom half of the rolls. 

Step 4: Layer mozzarella and smoked Gouda slices.

Step 5: Place the seasoned roast beef, caramelized onions, and crispy French onions on top of the rolls. Place the top half of the rolls over the filling.

Step 6: Pour the remaining butter mixture over the tops of the rolls. Bake at 425°F for 10-15 minutes, or until the cheese is melted and the rolls are golden brown.

Tips for the Best Roast Beef Sliders

• Toast the rolls: Don’t skip the pre-bake step—it ensures the rolls hold their shape and don’t get soggy.
• Layer strategically: Start with the sauce, then cheese, followed by the beef and onions. This order guarantees melty cheese and evenly distributed flavors.
• Don’t rush the onions: Take your time caramelizing the onions. Their sweetness adds depth and balances the savory roast beef.
• Make ahead: Prep everything in advance and assemble right before baking for stress-free entertaining.

These sliders are endlessly versatile and pair well with just about anything. For a full meal, serve them with sides like potato salad, coleslaw, or a warm bowl of french onion soup.

They also shine as part of a game-day spread alongside chips, dips, and garlic butter wings.

Want to keep things light? Pair them with a crisp green salad or roasted veggies for a balanced, satisfying meal. And if you’re hosting, consider setting up a slider bar with different sauces, cheeses, and toppings so guests can customize their own creations.