Roast Beef Horseradish Cheddar Sliders with Caramelized Onions
These indulgent sliders combine tender deli roast beef with tangy horseradish cheddar and sweet caramelized onions, all nestled in soft Hawaiian rolls. The combination of savory meat, sharp cheese, and buttery onions creates a perfect balance of flavors. Ideal for game day gatherings, casual dinners, or party appetizers, these sliders are baked until the cheese melts and the tops turn golden brown. The horseradish cheddar adds a distinctive kick that these beyond ordinary sliders.
Ingredients
- 1 yellow onion, peeled and thinly sliced
- 2 tablespoons butter, divided
- 1 tablespoon brown sugar
- 1 teaspoon salt
- 12 King's Hawaiian rollsbrioche slider buns1:1
slightly different sweetness
- 12 slices horseradish cheddar cheeseregular cheddar1:1adds heat back with prepared horseradish
conf:4
- 12 slices roast beef, deli styleturkey or ham1:1
different protein flavor profile
- ¼ teaspoon dried oregano(optional)
Instructions
- 1
Preheat oven to 350 degrees F
- 2
Melt 1 tablespoon butter in large skillet over medium-low heat
- 3
Add onion, brown sugar, and salt to skillet and cook until softened
- 4
Cut Hawaiian rolls in half horizontally and place bottoms in baking dish
- 5
Layer 6 slices cheese over roll bottoms to cover completely
- 6
Place 1 slice roast beef on each roll, bunching to fit
- 7
Spoon 1 teaspoon caramelized onions onto each roast beef slice
- 8
Layer remaining 6 slices cheese over onions
- 9
Place roll tops on cheese
- 10
Melt remaining butter and brush over roll tops
- 11
Sprinkle with oregano if using
- 12
Bake until cheese melts and tops brown
- 13
Cut sliders apart before serving warm
Tips
Don't separate rolls before cutting to keep them stable during assembly
Bunch roast beef slices to fit properly on each roll and create hearty portions
Brush butter on tops for golden, crispy finish
Good to Know
Cover and refrigerate assembled sliders up to 4 hours before baking
Caramelize onions up to 2 days ahead and refrigerate
Serve immediately while cheese is melted and rolls are warm
Common Mistakes
Don't overcook onions to avoid burning
Keep oven temperature accurate to prevent dry rolls
Substitutions
conf:4
slightly different sweetness
different protein flavor profile
FAQ
Can I make these ahead of time?
Assemble sliders completely and refrigerate up to 4 hours, then bake when ready to serve.
What if I can't find horseradish cheddar?
Use regular cheddar and add prepared horseradish to the roast beef for similar flavor.
How long do leftovers keep?
Store covered in refrigerator for 2-3 days and reheat in oven at 300°F until warmed through.