Beef Slider Recipe {with cheese & caramelized onions}

This easy beef slider recipe is topped with lots of leftover roast beef, Swiss cheese, caramelized onions and has a simple horseradish mayo – delicious for both dinner and game day!

Hey guys!

Just a little while back, I shared a recipe for caramelized onions. So, what did I do with ’em (besides enjoying straight outta the pan??)

I made a delicious beef slider recipe!! Well, beef sliders with caramelized onions, plenty of ooey gooey cheese and a horseradish mayo. Hungry yet?

Hubby and I started making sliders for Halloween.

Random, right?

I don’t know why we started doing that, but it’s definitely not a bad idea 😉

What are Sliders?

Sliders are basically little burgers or sandwiches.

Because they’re little (typically two inches across), if they’re the main course for dinner, then one would typically enjoy a few.

And, forgetting all these technicalities….don’t ya think mini food is the cutest??

How to Make this Beef Slider Recipe

PREPARE BUNS

• Buns usually come uncut. For each set of 12 buns, CAREFULLY use a knife to cut the buns in half through the middle (so you have a bottom half and top half, leaving individual buns intact).
• Spread horseradish mayo on both bottom and top of each set of buns.

ASSEMBLE ROAST BEEF SLIDERS

• Distribute leftover roast beef (that has been shredded) over top.
• Now, spread a layer of delicious caramelized onions over beef.

• Layer on cheese slices.
• Place top buns over cheese.
• Brush buns with a little melted garlic butter.

BAKE!

• Cover with foil and bake (part-way through, remove foil).
• Once shredded beef sliders are heated through and cheese is melted, carefully remove from oven, cut into pieces and enjoy!

What Type of Bun Do I Use for This Beef Slider Recipe?

Many grocery stores now carry small buns specifically for this purpose.

I picked up ‘brioche’ buns, but choose whatever variety you like best.

Can’t find slider buns? Use dinner rolls! If there’s too much bread, just cut out some of the centre so you have a thinner top and bottom. Easy peasy!

Can I Use Store Bought Beef Instead of Leftover Roast Beef?

Absolutely! Just go to your grocery deli and ask them to cut some off for you!

‘Shaved’ roast beef from your deli works great here too.

If you’re looking for some delicious ways to cook roast beef, here are some faves –

• Tender Oven-Braised Pot Roast from Sweet Tea and Thyme – This oven braised roast is melt in your mouth delicious.
• Worcestershire Butter Roast Beef from Rock Recipes – Lots of butter and savoury Worcestershire sauce make this one super flavourful.
• Slow Cooker Chuck Roast from Sunday Supper Movement – With lots of fresh herbs, this is such a classic preparation.
• Instant Pot Pot Roast from Fantabulosity – This recipe cooks a roast from frozen in your Instant Pot.

Can I Make These Roast Beef Sliders Ahead of Time?

If your leftover roast beef is still fresh, you sure can!

Make ahead of time, cover well and refrigerate up to a day ahead (don’t brush garlic butter on ’em until you are ready to bake).

You may need to bake them a tad longer to heat them through and get the cheese all melty.

How to Make Horseradish Mayo

All that’s needed for this horseradish mayo is horseradish, mayo and a pinch each of salt and pepper.

Use as little or as much horseradish as you like, depending on your preference.

Tip—>Place horseradish in a paper towel or clean tea towel and squeeze excess moisture outta there so you don’t water down the mayo.

Not into horseradish mayo? Mix things up! Add either hot sauce, bbq sauce or Dijon mustard to mayo instead…or just have the mayo as is. Either works wonderful with these pulled beef sliders!

Tips & Variations for Making This Beef Slider Recipe

Don’t have garlic butter on hand? Infuse some butter with minced garlic and heat up to get that garlic goin’. Not a fan of garlic? Use regular ol’ butter!

Swiss cheese was used here, but you could use your favourite melty cheese. Cheddar, mozzarella or gouda would also be delicious options.

Don’t have caramelized onions on hand or don’t have time to make them? Try fried onions instead. They’re quicker to prepare and you’ll still get an onion flavour!

Add some texture! Sprinkle some sesame seeds or poppy seeds onto those buttered buns before baking.

If you have leftover au jus from your roast beef dinner, warm that up and serve alongside so they’re like french onion beef sliders!

These are beef sliders for a crowd (hello weekend get together), but you could easily half the recipe if you prefer.

Like this Cheesy Recipe? You May Enjoy These Too

• Cheesy Ground Beef Quesadillas – Made in minutes, these quesadillas are beefy, cheesy and straight up comfort food.
• Chicken & Cheese Quesadillas – With plenty of chicken, cheese, black beans and hot peppers, this quesadilla recipe is always a winner.
• Pizza Grilled Cheese – All the flavours of pizza in a grilled cheese sandwich? Oh yeah…this one is delicious!

Hope you love this easy beef slider recipe as much as we do!

Until next time, take care and chit chat again soon,

~Dawn

P.S. If you think these beef sliders will make your belly happy too, please be sure to hit that little Pin button. Many thanks, you guys! XO

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5 from 10 votes

Beef Sliders Recipe {with horseradish mayo}

This easy beef slider recipe is topped with lots of leftover roast beef, Swiss cheese, caramelized onions and has a simple horseradish mayo – delicious for both dinner and game day!

Course Appetizer, Main Course, Snack

Cuisine American

Keyword easy slider recipe, game day recipe, recipes using leftover beef

Prep Time 10 minutes

Cook Time 20 minutes

Total Time 30 minutes

Servings 24 sliders

Author Dawn – Girl Heart Food

Ingredients

Beef Sliders

• 24 mini slider buns -I used 'brioche'
• 2 lbs cooked roast beef -shredded (about 5.5-6 cups). Or use store-bought shaved roast beef.
• 1 cup caramelized onions -or use fried, if you like
• 320 grams Swiss cheese slices -about 12 slices, 12 ounces or 3.5 – 4 cups shredded
• 2-3 tbsp garlic butter -melted

Horseradish Mayo

• 1 cup light mayo
• 6-8 tbsp horseradish -squeezed of excess moisture (use less if you want less of a horseradish flavour)
• pinch black pepper
• pinch salt

Instructions

Beef Sliders

• Carefully cut buns in a half (horizontally so you have a bottom portion and top portion (and leave individual buns intact)). Preheat oven to 350F.

  Note: This recipe makes 24 sliders. You can easily half the recipe if you like.
• Spread horseradish mayo over insides of buns. Place bottom buns in a baking dish (use two baking dishes (one for each set of 12 buns)).
• Distribute beef over buns. Top with caramelized onions and cheese. Then, place top buns over top.
• Cover with foil and bake in preheated oven for 15 minutes. Carefully remove foil and bake another 5 minutes or so or until cheese is melted and sliders are heated through.

Horseradish Mayo

• Squeeze excess moisture from horseradish via a sieve or using a clean tea towel. This helps prevent your mayo from being watered down.
• Then, combine all ingredients in a bowl, stirring well to combine.

  Note: Add a tablespoon or so of horseradish at a time until you've reached your desired flavour.

Video

Notes

• Prep time does not include caramelizing onions. If you are including those and do not already have on hand, they take about 60 minutes to prepare.
• Don’t have garlic butter on hand? Infuse some butter with minced garlic and heat up to get that garlic goin’. Not a fan of garlic? Use regular ol’ butter!
• Swiss cheese was used here, but you could use your favourite melty cheese. Cheddar, mozzarella or gouda would also be delicious options.
• Don’t have caramelized onions on hand or don’t have time to make them? Try fried onions instead. They’re quicker to prepare and you’ll still get an onion flavour!
• Add some texture! Sprinkle some sesame seeds or poppy seeds onto those buttered buns before baking.
• If you have leftover au jus from your roast beef dinner, warm that up and serve alongside so they’re like french onion beef sliders!
• These are beef sliders for a crowd (hello weekend get together), but you could easily half the recipe if you prefer.
• More recipe tips in body of post above.

Tried this recipe? That’s awesome!Mention @dawn.girlheartfood or tag #girlheartfood