French Onion Beef Sliders

Delicious French Onion Beef Sliders topped with melted cheese on a serving platter.

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These French Onion Beef Sliders are juicy little sandwiches bursting with flavor! With tender beef and sweet caramelized onions, they are a tasty treat perfect for any gathering.

Honestly, who can resist melty cheese on top? I love serving these sliders with a side of crispy fries. They always disappear fast, and I might just lose track of how many I’ve eaten! 😄

Key Ingredients & Substitutions

Beef Chuck Roast: This cut is perfect for slow cooking because it’s tender and flavorful. If you can’t find it, you can substitute with brisket or round roast. Just remember, the longer the cooking time, the more tender the meat will become.

Onions: Yellow onions are great for caramelizing, but if you prefer a milder flavor, sweet onions like Vidalia are a fantastic alternative. They’ll give a sweeter taste to your sliders. If you’re in a pinch, you could use frozen caramelized onions!

Swiss Cheese: Traditional Swiss cheese adds delicious creaminess. If you’re looking for a substitute, try provolone or Gruyère cheese. Both melt beautifully and keep the classic flavor going!

Slider Buns: While standard slider buns work well, you can switch it up with brioche or pretzel buns for a richer taste. If gluten is a concern, there are great gluten-free buns available too!

How Do You Get Perfectly Caramelized Onions?

Caramelizing onions can seem tricky, but it’s all about patience and the right technique. This step adds deep flavor, making your sliders taste amazing. Here’s how to do it:

  • Use a large skillet over medium heat. Add a splash of olive oil and a bit of butter to enhance flavor.
  • Once the pan is hot, add your thinly sliced onions and stir them well to coat. This will help them cook evenly.
  • Cook for 25-30 minutes. Stir occasionally to prevent sticking and burning. The key is to let them develop that golden brown color.
  • If they start to stick, add a bit of water or broth to deglaze the pan. This will enhance flavor without losing those bits stuck to the bottom!

Follow these steps, and your onions will be sweet and beautifully caramelized, perfect for your sliders!

French Onion Beef Sliders

Ingredients You’ll Need:

For the Beef:

  • 2 lbs beef chuck roast, trimmed
  • Salt and pepper, to taste
  • 2 tablespoons olive oil

For the Caramelized Onions:

  • 4 large yellow onions, thinly sliced
  • 3 cloves garlic, minced
  • 1 cup beef broth
  • 1 tablespoon Worcestershire sauce
  • 1 teaspoon fresh thyme leaves (or 1/2 teaspoon dried thyme)

For the Sliders:

  • 12 slider buns, split
  • 8 ounces Swiss cheese, sliced
  • 2 tablespoons butter, melted
  • Fresh thyme sprigs, for garnish (optional)

How Much Time Will You Need?

This recipe takes about 15-20 minutes to prep, plus around 3 hours for cooking in the oven. Once you have everything put together, you can just relax while it cooks. And, it only takes a couple of minutes at the end to broil those delicious sliders to perfection!

Step-by-Step Instructions:

1. Preheat Your Oven:

Start by preheating your oven to 325°F (163°C). This way, it’s nice and ready for the beef when you’re done preparing.

2. Season the Beef:

Generously season the beef chuck roast all over with salt and pepper. Don’t be shy—this helps enhance the flavor of the meat.

3. Sear the Beef:

In a large oven-safe skillet or Dutch oven, heat 2 tablespoons of olive oil over medium-high heat. Once hot, carefully add the beef and sear it on all sides until it’s nicely browned—this should take about 3-4 minutes per side. When done, remove the beef from the pan and set it aside.

4. Caramelize the Onions:

In the same pan, add the thinly sliced onions. Cook them over medium heat, stirring frequently until they turn golden brown and caramelized. This process will take 25-30 minutes, but it’s worth the wait for that delicious sweetness!

5. Add Garlic and Seasonings:

Once the onions are caramelized, stir in the minced garlic and cook for another 1-2 minutes, until fragrant. Your kitchen will smell amazing!

6. Combine Beef and Onions:

Return the beef to the pan, placing it among the onions. Pour in the beef broth and Worcestershire sauce, then sprinkle the thyme on top. These flavors will combine beautifully!

7. Bake the Beef:

Cover the pan with a lid or aluminum foil and place it in the preheated oven. Let it cook for about 3 hours or until the beef is super tender and easily shredded with a fork.

8. Shred the Beef:

Once the beef is done, remove it from the oven and take it out of the pan. Use two forks to shred the meat. Then, mix the shredded beef back into the caramelized onions.

9. Prepare for Broiling:

Preheat your oven’s broiler. While it’s heating, split the slider buns in half and brush the cut sides with melted butter. This will give them a lovely golden color when broiled.

10. Assemble the Sliders:

On a baking sheet, place the bottom halves of the buns. Top each with a generous portion of the beef and onion mixture, and then layer on slices of Swiss cheese. 

11. Broil the Sliders:

Broil the sliders in the oven for about 2-3 minutes, or until the cheese is melted and bubbly. Keep an eye on them so they don’t burn!

12. Serve and Enjoy!

Once they’re ready, remove them from the oven and place the top halves of the buns on. Optionally garnish with fresh thyme sprigs for a touch of elegance. Serve warm and enjoy the flavorful burst of French Onion Beef Sliders!

These sliders are a savory delight that’s sure to impress. Perfect for parties, family gatherings, or just to satisfy your cravings!

Can I Use Different Cuts of Beef for This Recipe?

Yes! While chuck roast is ideal for its tenderness and flavor, you can also use brisket or round roast if you prefer. Just keep in mind that cooking times may vary slightly based on the cut.

How Can I Store Leftover Sliders?

Leftover sliders should be stored in an airtight container in the refrigerator for up to 3 days. You can reheat them in the oven at 350°F (175°C) for about 10-15 minutes, or until warmed through.

Can I Make the Onions in Advance?

Absolutely! You can caramelize the onions a day ahead and store them in the refrigerator. Just reheat them when you’re ready to assemble the sliders!

What Can I Serve with French Onion Beef Sliders?

These sliders pair wonderfully with crispy fries, a fresh green salad, or potato chips for a crunchy contrast. You could also serve some dipping sauces like BBQ or a creamy ranch dressing!

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