This roast beef sliders recipe has been my go-to for casual gatherings, weeknight dinners when I want something satisfying but not fussy, and for any time I need a crowd-pleasing dish that disappears fast. I first assembled these in a hurry for a potluck when I realized I had a pound of thin-sliced deli roast beef and a package of sweet rolls sitting in the pantry. The result—a mix of tender meat, tangy horseradish mayo, melty provolone, and a golden butter-brown sugar glaze—was unexpectedly irresistible and instantly requested again.

What makes these sliders special is the balance of textures and flavors: the soft, slightly sweet buns contrast with the warm, savory beef and the sheen of melted cheese, while the horseradish mayo adds a bright, peppery lift. The butter glaze, enhanced with Dijon and Worcestershire, caramelizes the tops so that each bite has a glossy finish and just a hint of sweetness. I like to use King's Hawaiian or a quality soft dinner roll, and a deli roast beef from a trusted brand like Boar's Head for the best texture and flavor without extra prep. These sliders are simple to assemble, travel well, and are excellent warm from the oven or reheated gently the next day.

Ingredients

• 12 slider buns (dinner rolls or Hawaiian sweet rolls): Choose soft, slightly sweet rolls such as King's Hawaiian or Martin’s slider rolls. The tender crumb soaks up flavor without falling apart and helps balance the savory filling.
• 1/2 cup mayonnaise: Use a full-fat brand like Hellmann's/Best Foods for creaminess. Mayo creates a rich base for the horseradish spread and prevents the bottom buns from getting overly soggy.
• 2 tablespoons prepared horseradish: Adds a peppery kick; adjust to taste. Use a jarred prepared horseradish such as Silver Spring or B&G for consistent heat.
• 1 pound thinly sliced deli-style roast beef: Look for a tender, thin slice—roast beef from the deli counter or pre-sliced packaged roast beef both work. Brands like Boar's Head provide good quality and even slices.
• 6 slices sharp provolone cheese: Sharp provolone gives a tangy, slightly piquant melt. You can substitute sharp cheddar or Swiss for different flavor profiles.
• 4 tablespoons unsalted butter, melted: Creates the glossy glaze. Unsalted lets you control saltiness; you'll add coarse salt separately for balance.
• 1/2 tablespoon packed light brown sugar: A touch of sweetness to caramelize the tops and complement the savory beef.
• 1 tablespoon Dijon mustard: Adds depth and slight acidity to the glaze; use Maille or Grey Poupon for a robust flavor.
• 2 teaspoons finely minced sweet onion: Finely mince to distribute the onion flavor without large bits—Vidalia or another sweet onion works well.
• 1 tablespoon Worcestershire sauce: Provides umami and a savory backbone to the butter glaze; use Lea & Perrins for best results.
• 1/2 teaspoon coarse salt: Balances flavors in the glaze. Adjust to taste if using salted butter.
• 1 tablespoon poppy seeds: Optional crunchy garnish that adds texture and a classic look to the tops of the sliders.

Instructions

Preheat and prepare: Preheat the oven to 350°F and lightly grease a 9-by-13-inch baking dish. If your rolls are connected in a package, leave them intact—this makes them easier to slice and keeps the bottoms aligned. Greasing the dish prevents sticking and helps ensure even browning on the bottom. Split the buns: Split the buns down the middle horizontally, keeping them in their original arrangement so you can reassemble easily. Place the bottom halves in the prepared baking dish in a single layer, fitting them snugly so edges touch and heat distributes evenly. Make the horseradish spread and assemble: In a small bowl, stir together the mayonnaise and prepared horseradish until smooth. Spread this mixture evenly across the bottom half of each bun—this creates a creamy barrier that prevents sogginess while adding bright heat. Layer the roast beef in even portions across the buns, folding slices as needed for height, then drape the provolone slices over the meat. Place the top halves of the buns onto the sandwiches. Create the butter glaze: In a small saucepan over low heat, melt the butter with the packed light brown sugar, stirring until the sugar dissolves and the mixture is smooth. Remove from the heat and whisk in the Dijon mustard, finely minced sweet onion, Worcestershire sauce, and coarse salt. The residual heat helps marry the flavors; whisk until homogenous and glossy. Top, bake covered: Spoon or brush the butter mixture evenly over the tops of the assembled sliders, making sure each roll has a little of the glaze. Sprinkle the poppy seeds over the tops. Loosely cover the baking dish with aluminum foil—this traps steam to melt the cheese without over-browning—and bake for 10 minutes at 350°F. Finish uncovered: Remove the foil and continue to bake until the tops are golden brown and the cheese is fully melted, about 8 to 10 more minutes. Keep an eye on the last few minutes to prevent over-browning; you want a lacquered, golden top rather than dark caramelization. Serve warm: Let the sliders rest for a minute, then cut between rolls to separate into individual sandwiches. Serve warm—the horseradish mayo will be slightly warmed and the provolone beautifully melty.

Storage Tips

Store cooled sliders in an airtight container in the refrigerator for up to three days. If you expect leftovers, cut into individual sandwiches and layer with parchment to prevent sticking. For longer storage, assemble unbaked sliders in a freezer-safe dish, wrap tightly with foil, and freeze for up to three months. To reheat refrigerated sliders, cover with foil and warm in a 325°F oven for 10–12 minutes or until heated through. From frozen, bake covered at 350°F for about 25–30 minutes, then uncover for an additional 10 minutes to brown the tops. A gentle reheat preserves the texture and flavor better than microwaving, which can make the rolls gummy.

Ingredient Substitutions

If you don’t have provolone, swap in sharp cheddar for boldness or Swiss for nuttiness; both melt well. For a lower-sodium option, choose reduced-sodium roast beef or rinse deli slices briefly under cold water and pat dry to remove surface salt. If you prefer less heat, reduce horseradish to 1 teaspoon or use creamed horseradish for milder flavor. To make a vegetarian version, substitute thinly sliced portobello mushrooms or roasted eggplant for the roast beef and increase seasoning in the butter glaze to compensate for the reduced umami.

Serving Suggestions

Serve these sandwiches with crisp, acidic sides to cut the richness: a simple green salad with lemon vinaigrette, tangy coleslaw, or quick pickles are excellent. For a party, add a platter of olives, pickled vegetables, and potato chips. Garnish with fresh parsley or chives for color. For a heartier meal, pair with roasted potatoes or a warm, garlicky green bean dish. These sliders also travel well—wrap individually in wax paper for picnic-style serving.

Seasonal Adaptations

In summer, brighten the spread with a spoonful of chopped fresh basil in the horseradish mayo or swap the poppy seeds for sesame seeds and add thin slices of ripe tomato (pat dry to avoid sogginess). In autumn and winter, incorporate caramelized onions into the butter glaze for deeper savory notes and consider swapping provolone for a smoked cheese to add warmth. For a festive holiday version, add a thin smear of cranberry chutney beneath the roast beef for a sweet-tart contrast that pairs beautifully with the brown sugar glaze.

Meal Prep Tips

To streamline weekday meals, assemble the sliders in the morning and cover them tightly in the refrigerator; bake in the evening straight from chilled—add an extra 4–6 minutes to the covered baking time. If preparing for a party, prep the horseradish mayo and butter glaze ahead and store in airtight containers; warm the butter glaze gently before applying. Use a serrated knife to cut the assembled slab into individual portions cleanly, wiping the blade between cuts for neat edges. Pack reheatable containers for lunches—reheat in a small toaster oven for best texture.

Success Stories

One of my most memorable moments with this dish was serving it at a friend’s baby shower: guests loved the ease of eating and the bold horseradish kick, and many asked for the recipe. A college potluck friend recreated them using leftover roast from a Sunday roast and reported back that they disappeared first. A reader once wrote to say she doubled the recipe for a church event and received multiple requests to bring them back next month—proof these sandwiches travel well and please a crowd.

These sliders combine practical assembly with flavors that feel special—perfect for making and sharing. Try them once and you’ll find yourself reaching for these same rolls and that butter glaze time and again.