Name: French Dip Sliders
Prep time: 15 min
Cook time: 20 min
Total time: 45 min
Ingredients: 12 Hawaiian rolls; 3/4 lb deli roast beef, thin sliced; 6-8 slices provolone cheese; 2 T butter (melted); ½ tsp thyme (dried); coarse sea salt (optional); 1 yellow onion; 8 oz mushrooms (sliced); 2 T butter; 1/4 tsp salt; 1 tsp sugar optional; 1 T butter; 1 1/4 c beef broth; 1 T Worcestershire; 1-2 garlic cloves, minced; 1/2 tsp thyme; sea salt (to taste)

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These buttery topped French Dip Sliders are a simple, delicious appetizer with caramelized onions and mushrooms, melted cheese and a flavorful au jus for dipping. Great for any party or gathering and will certainly steal the show!

French dip slider with roast beef, provolone, onion and mushroom stacked on other sandwiches.

Get ready for the big game or the big party with these delicious French Dip Sliders. Simple to whip up and so flavorful.

A fun twist on the classic sandwich that will have EVERYONE digging in! Try these reuben sliders as well!

Why You Will Love These French Dip Sliders:

They are so easy to prep. You can make a whole tray of sandwiches in just a few steps--that is why sliders are so amazing! Sauté the onions and mushrooms and then layer everything together and bake. The au jus is technically optional but another super simple addition.
Simple, basic ingredients come together in a flavorful appetizer. Using deli meat and cheese in these roast beef sliders makes for a convenient, but still amazing dish. You are not skimping by using these basics, promise.
These French Dip Sliders taste AMAZING. And isn't that all we really want? The layers of flavor, the melty cheese, the caramelized veggies--it's an experience, let me tell you!
Perfect for any gathering. A tray of sliders is always the sign of a good party. Perfect for everyone to grab and dig into. Just make sure you make enough!

Ingredients and Swaps:

Hawaiian rolls: The rolls that come in a pack of 12 are perfect as they can be cut in half and are all connected still. This makes for simple assembly. However, you can still use another slider bun and just arrange them close together.
roast beef: thin sliced from the deli is perfect. Shaved will work as well. You can certainly slow cook your own roast beef if desired but I love the ease of deli meat.
provolone: for a fun twist, use smoked provolone. You could also use swiss or gruyére if desired.
butter: You will use butter for all three parts when making these French dip sliders. Unsalted is my preference.
onions: yellow onions are our preference, but white onion or a shallot could work
mushrooms: sliced mushrooms
thyme: fresh thyme or dried will both work. You can omit if you don't have any as the au jus is still delicious without it.
beef broth: I like low sodium beef broth so that I can add or adjust as desired.
red wine (optional): this is a great option to add flavor to the au jus but you can certainly omit it and just add that amount of beef broth.
worcestershire sauce: my favorite part of the au jus!
garlic: freshly minced is ideal, but garlic powder will sub well

How to Make These Roast Beef Sliders:

These French dip sliders are so simple to make. Start by caramelizing the onions and mushrooms.

Melt the butter and add the onions and mushrooms. Cook, stirring frequently for several minutes until they onions soften and become translucent. Add the thyme, sugar and salt and continue to cook until the onions become a rich caramel color. Remove from heat.

Overhead view of cast iron skillet with raw onion and mushrooms in butter. — Melt butter and add onion and mushroom.

Caramelized onions and mushrooms in skillet. — Melt butter and add onion and mushroom.

Slice the Hawaiian rolls in half, keeping them all still connected. Place the bottoms of the rolls in a 9x13 inch pan or large casserole dish.

Layer the roast beef, provolone, onions and mushrooms and then the tops of the rolls. Brush the tops of the rolls with melted butter. Top with a sprinkle of coarse salt if desired.

Bottom layer of Hawaiian rolls in baking dish. — Slice Hawaiian rolls in half while still attached to each other.

Roast beef slices layered on top of Hawaiian rolls in baking dish. — Slice Hawaiian rolls in half while still attached to each other.

Bake the roast beef sliders, loosely covered in foil for 15 minutes or until cheese is melted. Remove the foil and bake another 5-7 minutes or until the tops of the buns are toasted and golden.

While the sliders are baking, whisk together the au jus ingredients in the same skillet used to cook the onions and mushrooms. Simmer for about 10 minutes or until it slightly reduces.

When the sliders are cooked, cool for several minutes and then slice apart for easy serving. Enjoy!

Overhead view of au jus in bowl with roast beef sliders surrounding it.

Chef's Tips:

To keep the buns from getting too soggy: add the cheese first and last so that it is the only layer that touches the bread. Also, if you decide to use a roast beef that has been cooked in juices versus deli roast beef, make sure to drain as much of the juices off before adding to the rolls.
Reheating Instructions: you can bake these within 3 days of cooking. Bake at 350°F in a foil covered dish for about 8-10 minutes. You can also microwave them if desired for bout 45 seconds--this will vary based on your microwave so keep an eye on them.

Ways to Vary These French Dip Sliders:

Easily vary or add to these roast beef sliders with the following additions:

Add sautéd peppers. Toss in some thin sliced bell peppers when cooking the onions and mushrooms. My husband is not a fan of the onions, so sometimes I omit them and just do peppers and mushrooms.
Mayo or mustard: If you love condiments as much as I do, then a bit of your favorite dijon mustard or some mayo is great to add to the rolls before topping the sandwiches.
Horseradish: another favorite addition. Slather it onto the rolls or just serve it on the side.
Change up the cheese: I mentioned the option of using Swiss or gruyére, but you could switch it to cheddar, American, pepper jack or another cheese you love.