French Onion Roast Beef Sliders

Whether you are planning a family movie night, gathering or a tailgating hangout, these French Onion Roast Beef Sliders are a great way to feed a crowd! Prep your ingredients, assemble and then bake for 15-20 minutes and serve!

Once football season rolls around, it's all about the eats for me and the game for my husband and friends. I am the only one who has no clue what's going on, on-screen. Haha, but that's fine. I am who I am. I get my kicks (pun intended) from what I make and how others enjoy them. The drinks and the eats! These Beef Sliders are always a hit!

Why You'll Like This Recipe

These French Onion Roast Beef Sliders don't take much effort to make. Deli roast beef, onions, cheese, and rolls. That's pretty much it. The roast beef was made for you, all you have to do is caramelize some sweet onions and then assemble your sliders. Then bake and serve.

These are easy to prep and serve to a crowd, a perfect game day food recipe! They are super flavorful too and easy to pick up and enjoy while tailgating. Another easy beef recipe is slow cooker pepper steak recipe. My dad always made something similar growing up.

Beef is always a great low calorie high protein choice for sandwiches or on its own.

I decided to flavor the onions as I would French Onion Soup, I thought that would be a fun flavor profile. The combination of Hawaiian rolls, the beef, the cheeses, and the onions works.

Instructions for Roast Beef Sliders

Making the sliders is made easy by using deli roast beef. Other than that, all you need to do is caramelize the onions, and make the liquid. After that assemble the sliders and bake till the cheese melts. You can also try these Turkey Burger Sliders to feed a crowd.

Beef Sliders Ingredients

• Butter
• Vidalia onions
• Worcestershire sauce
• Beef stock/broth
• Salt & black pepper
• onion powder & garlic powder
• Hawaiian rolls (I use Kings)
• Gruyere cheese
• Thyme leaves

Full ingredients and instructions in the recipe card below.

Variations

You can choose to add a horseradish mayo to change things up. You can also swap the Gruyere for Provolone cheese.

Do Ahead

• These are best made and enjoyed fresh, however, you can make the onions ahead of time and then just finish off by reheating the onions and adding the sauce components from there.
• If you are tailgating, assemble just before heading out (or on-site), cover with foil and heat on indirect heat on grill or Blackstone.

If you enjoy beef recipes, check out some of my favorites like these seriously amazing Beef Enchilada's (You'll never order them out again, lol!)

This Steak & Roasted Red Pepper Flatbread 

Or This Asian Stean & Noodle Salad -Yum!! 

Game Day Recipes To Try

This post was funded by The Beef Checkoff. Originally published January, 2020. Updated October, 2023.

Enjoy! XO Colleen

French Onion Roast Beef Sliders

Colleen Kennedy

A great game day recipe or recipe for feeding a crowd. French Onion Roast Beef Sliders. Flavorful and fun!

5 from 6 votes

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 30 minutes mins

Total Time 40 minutes mins

Course Sandwiches

Cuisine American

Servings 6 servings

Calories 315 kcal

Ingredients

  

1x2x3x

• 4 TBS butter divided
• 2 medium Vidalia onions
• 1 TBS Worcestershire sauce
• ½ cup beef stock/broth
• Salt & black pepper
• 1 teaspoon onion powder
• 1 teaspoon garlic powder
• ¾ pounds deli roast beef slices seasoned with salt & pepper
• Hawaiian rolls I use Kings
• 1-1 ½ TBS mayo optional
• 1 ½ cups shredded Gruyere cheese
• ½ TBS fresh Thyme leaves

Instructions

 

• In a large saute pan, melt 2 tablespoons of butter and over medium heat, cook onions until mostly caramelized (don't let them get dry or begin to burn, you want them moist).
• Heat oven to 350 degrees.
• Once the onions are done to your liking, add in the beef broth and Worcestershire. Season with black pepper, onion powder, and garlic powder. Add salt if you feel its necessary since the stock/broth may be salty. (You can also switch from onion or garlic powder to onion or garlic salt...just watch out for over-salting).
• Bring mixture just to a simmer and then turn off the heat.
• Arrange your rolls in a casserole dish, nestling them together. Either remove the tops from the rolls or "open them" leaving one side intact.
• If you like, brush the bottom roll with just a bit of mayonnaise, top that with a bit of the shredded Gruyere, then top that with a couple of slices or so of roast beef, folded.
• Top Roast beef with more of the Gruyere cheese and top the cheese with the onions (using a fork or tongs to remove onions from the liquid).
• Close the rolls or place the tops of the rolls back on, and brush rolls all across the top with some of the remaining liquid from the pan. Sprinkle tops with a pinch or two of onion powder and the Thyme leaves and bake for 15-20 minutes or until sandwiches are heated through and cheese is melted.
• If you enjoy dipping your sandwiches in an au jus, use the remaining liquid for dipping (and/or double it if you like).

Notes

You can choose to split the cheese up some above and some below the beef or pile it all at once.

To reheat on the go, either make just before departing or assemble on-site and heat, covered with foil via indirect heat on grill or Blackstone

Nutrition

Serving: 6servingsCalories: 315kcalCarbohydrates: 5gProtein: 23gFat: 23gSaturated Fat: 12gPolyunsaturated Fat: 3gMonounsaturated Fat: 7gTrans Fat: 0.3gCholesterol: 90mgSodium: 1210mgPotassium: 277mgFiber: 1gSugar: 2gVitamin A: 579IUVitamin C: 30mgCalcium: 510mgIron: 2mg

Keyword french onion sliders, roast beef sliders

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