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Golden brown Roast Beef Slider Sandwiches with melted cheese on a white plate.
Maryam

Roast Beef Slider Sandwiches

Buttery, cheesy roast beef sliders with a tangy horseradish spread that disappear fast at any party.
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Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings: 12 sliders
Course: Appetizer, Main Course
Cuisine: American
Calories: 285
Ingredients Equipment Method Notes

Ingredients
  

For the Sliders
  • 1 package Hawaiian sweet rolls 12 count, sliced horizontally in half
  • 12 oz deli roast beef thinly sliced, warmed slightly
  • 6 slices Swiss cheese halved to fit rolls
  • 6 tbsp unsalted butter melted
For the Horseradish Spread
  • 0.25 cup mayonnaise
  • 2 tbsp prepared horseradish drained
  • 1 tbsp Dijon mustard
  • 0.5 tsp Worcestershire sauce
  • 0.25 tsp garlic powder
  • 1 tsp poppy seeds optional, for topping

Equipment

  • 9x13-inch baking dish
  • Small mixing bowl
  • Serrated knife

Method
 

Prep
  1. In a small bowl, stir together mayonnaise, horseradish, Dijon mustard, Worcestershire sauce, and garlic powder until smooth. Taste and add more horseradish if you want extra kick.
  2. Preheat oven to 350°F. Without separating the rolls, slice the entire package in half horizontally using a long serrated knife. Place the bottom half cut-side up in a 9x13 inch baking dish.
  3. Spread half the horseradish mixture over the bottom buns. Layer on the roast beef, folding it rather than laying flat so it heats evenly. Top with Swiss cheese halves, then spread the remaining horseradish mixture on the cut side of the top buns and place over the cheese.
  4. Pour melted butter evenly over the top of the rolls, letting it drip down the sides. Sprinkle with poppy seeds if using. Cover the dish tightly with foil.
  5. Bake covered for 15 minutes, then remove foil and bake 5 minutes more until the cheese is fully melted and the tops are lightly golden. Let rest 5 minutes before pulling apart to serve warm.

Notes

Warm the roast beef slightly in the microwave before assembling - cold meat straight from the fridge won't heat through properly in the short bake time. For a milder version, swap the horseradish spread for softened cream cheese mixed with a little Dijon. These keep well wrapped in foil for up to 2 hours at room temperature, or reheat covered at 325°F for 10 minutes.