Looking for a decadent way to use your leftover prime rib? These Prime Rib Sliders with Caramelized Onions and Horseradish Cream Sauce are the ultimate appetizer or indulgent lunch option. Perfectly nestled in soft Hawaiian rolls or your favorite slider buns, these sliders are rich, flavorful, and sure to impress your family and friends. Whether you’re hosting a holiday party or enjoying a cozy lunch, this recipe is one of the best ways to enjoy prime rib of beef.
Ingredients for Prime Rib Sliders
For the Sliders:
- Slices of cooked prime rib of beef
- Buns of your choice (soft Hawaiian rolls recommended)
For the Caramelized Onions:
- 4 large onions, halved and sliced thinly
- ¼ cup butter
- ¼ teaspoon salt
- Fresh ground black pepper
- 3–4 tablespoon balsamic vinegar
- 3–4 tablespoon brown sugar
- 6 fresh rosemary stems
- 2 bay leaves
For the Horseradish Cream Sauce:
- 2 tablespoon prepared horseradish
- ¼ cup sour cream
- 2 teaspoon Worcestershire sauce
- 2 teaspoon Sriracha
Step-by-Step Instructions
Caramelized Onions:
- Slice the large onions thinly and evenly for the best results.
- Melt butter in a large skillet over medium heat, then add the onions.
- Cook the onions slowly until softened, about 15 minutes.
- Add the rosemary stems and bay leaves. Stir well and cook for another 20 minutes, until the rosemary wilts. Remove the rosemary and bay leaves carefully.
- Mix in balsamic vinegar, brown sugar, salt, and black pepper. Continue cooking, stirring often, until the onions turn golden brown and caramelized. Be cautious to avoid burning.
Horseradish Cream Sauce:
- Combine prepared horseradish, sour cream, Worcestershire sauce, and Sriracha in a small bowl.
- Blend with a hand blender or whisk until the sauce is smooth and creamy.
Assembling the Sliders:
- Slice your slider buns and add slices of room temperature prime rib to the bottom bun.
- Add a generous scoop of caramelized onions and drizzle with the horseradish cream sauce.
- For an extra indulgent touch, add au jus or gravy from the prime rib pan drippings.
- Top with provolone cheese, if desired, and place in a f oven (375°F) for a few minutes to melt the cheese and warm the sliders.
- Serve immediately and enjoy the tender, flavorful sliders.
Prime Rib Sliders
Ingredients
- slices of cooked prime rib see above for links to recipes
- buns of your choice
Caramelized Onions:
- 4 large sweet onions halved and cut thinly
- ¼ cup butter
- ¼ teaspoon salt
- fresh ground pepper
- 3 – 4 tablespoon balsamic vinegar
- 3 – 4 tablespoon brown sugar
- 6 fresh rosemary stems
- 2 bay leaves
Horseradish Cream Sauce:
- 2 tablespoon prepared horseradish
- ¼ cup sour cream
- 2 teaspoon Worcestershire sauce
- 2 teaspoon Sriracha
Instructions
Caramelized Onions:
- Cut the onions in half, then slice them thinly.
- Melt the butter in a large skillet, then add the onions.
- Cook over low-medium heat until the onions are softened. About 15 minutes.
- Then add the rosemary stems and bay leaves. Mix. Cook for about 20 more minutes, until the rosemary has wilted.
- Once the rosemary has wilted, remove it and the bay leaves. You will likely have to remove stray rosemary leaves.
- Stir in the balsamic vinegar, sugar, salt and pepper.
- Continue cooking until the liquid is all gone, and the onions are caramel coloured and soft. Be very careful not to burn the mixture, so stir often.
Horseradish Cream Sauce:
- Combine the horseradish, sour cream, Worcestershire sauce and Sriracha. I like to use a hand blender to make the sauce nice and creamy.
Putting it all together:
- Add slices of cooked prime rib to a bun, add a scoop of caramelized onions and drizzle with the horseradish cream sauce. If you have gravy from the prime rib pan drippings, add that too, it will kick it up a knotch!
- Serve immediately and enjoy!
Helpful Tips for Perfect Prime Rib Sliders
- Use leftover prime rib: This is an excellent way to repurpose leftover prime rib into a crowd-pleasing dish.
- Choose the right buns: Soft Hawaiian rolls are the ideal choice for these sliders, but any slider buns will work.
- Caramelize onions slowly: Patience is key when making caramelized onions. Cooking them slowly over medium heat ensures a deep, sweet flavor and prevents burning.
- Customize your sauce: Adjust the spice level of the horseradish cream by adding more or less Sriracha.
- Make ahead: Prepare the caramelized onions and horseradish cream sauce in advance to save time when assembling the sliders.
FAQ
Can I use other types of beef instead of prime rib?
Yes! While prime rib of beef adds a luxurious touch, you can also use roast beef or steak slices for these sliders.
What sides go well with Prime Rib Sliders?
Serve with potato wedges, a simple salad, or even a warm bowl of soup for a complete meal.
How do I store leftover sliders?
Store assembled sliders in an airtight container in the fridge for up to 2 days. To reheat, place in the oven to warm through.
Can I make these sliders in advance?
Yes! Prepare the components—caramelized onions, horseradish cream, and sliced prime rib—up to two days in advance. Assemble and heat just before serving for the best results.
Why You’ll Love This Recipe
This recipe combines the richness of prime rib, the sweetness of caramelized onions, and the tangy kick of horseradish cream for a flavor-packed bite. The golden brown onions and provolone cheese take it to the next level, making it perfect for any special occasion or a cozy pretty life meal at home.
Whether you’re serving these for a Christmas gathering, game day, or a family lunch, these Prime Rib Sliders are guaranteed to impress. Enjoy!
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