Keto French Dip Sliders

Published January 26, 2026

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These French dip sliders are my low-carb take on a classic using tender roast beef, caramelized onions, melted cheese, and a simple homemade au jus that delivers real depth and flavor without hours of simmering.

Keto French dip sliders filled with tender roast beef and melted cheese, served with a bowl of au jus for dipping.

Close-up of a single keto French dip slider showing layers of roast beef, caramelized onions, and melted cheese.

A full pan of keto French dip sliders with soft browned tops and gooey cheese pulling apart between rolls.

Keto French dip slider being dunked into au jus with melted cheese and beef visible inside the roll.

60 Mins

Nutrition Facts

Serving Size:
1 slider

Servings

178

Calories

12.9g

Fat

13g

Protein

1.2g

Net Carb

12.4g

Total Carbs

Disclaimer: The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.

French dip sandwiches were never meant to be dainty. They’re messy, drippy, beefy, and require at least three napkins… which is exactly why I missed them so much after going low carb. A bunless pile of roast beef just wasn’t cutting it. I wanted the full experience, something I could pick up, dunk, and inevitably drip down my wrist.

So these keto French dip sliders happened.

They’re stacked with warm roast beef, deeply caramelized onions, melted cheese, and tucked into soft keto slider rolls. But the real star here is the au jus. It’s homemade, ridiculously easy, and somehow tastes like it simmered all day, even though it didn’t. These sliders are meant to be dipped. No dry sandwiches allowed.

I’ve made these for weeknight dinners, casual get-togethers, and even game nights where everyone “just wants one”… and then somehow four disappear.

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Ingredients

5 tablespoons unsalted butter, divided
1 medium yellow onion, thinly sliced
2 thyme sprigs, plus 1/2 teaspoon chopped thyme
salt & pepper for seasoning
1 package (12-count) low-carb slider rolls
1 pound thinly sliced deli roast beef
6 slices provolone cheese
1 teaspoon chopped fresh parsley, plus more for serving
1/4 teaspoon garlic powder
1 large garlic clove, minced
1 ½ cups beef broth
1 tablespoon Worcestershire sauce

Step by Step Instructions

STEP

1
Caramelize the onion

Arrange a rack in the center of the oven and preheat to 350 degrees F. In a large skillet over medium high heat, melt 2 tablespoons butter. Add onion and thyme sprigs. Season with salt and pepper. Reduce heat to medium and cook, stirring occasionally, until onion is caramelized, about 30 minutes. Discard thyme.
Ingredients

2 tablespoons unsalted butter

1 medium yellow onion, thinly sliced

2 thyme sprigs
Quick Tip
A mandoline makes it easy to get evenly thin onion slices, which helps them cook at the same rate and caramelize properly instead of turning soft and uneven.
STEP

2
Cut the rolls

Place still-attached rolls on a cutting board. Cut buns in half parallel to the cutting board, keeping them attached. Place bottom buns on a parchment lined baking sheet or casserole dish, cut side up.
Ingredients

12 slider rolls
STEP

3
Assemble sliders

Top buns with beef, cheese, and caramelized onions. Close with top buns.
Ingredients

1 lb thinly sliced deli roast beef

6 slices provolone cheese
STEP

4
Buttery goodness

In a small bowl, microwave 2 tablespoons butter until melted. Brush on bun tops. Sprinkle with parsley and garlic powder. Season with salt.
Ingredients

2 tablespoons unsalted butter

1 teaspoon chopped fresh parsley

1/4 teaspoon garlic powder
STEP

5

Bake the sliders

Bake until warmed through and cheese is melted, 10-15 minutes.
STEP

6
Make Au jus

Meanwhile, in the same skillet over medium heat, melt remaining tablespoon of butter. Add minced garlic and cook until fragrant, 1 minute. Add broth, Worcestershire and chopped thyme. Season with salt and pepper. Bring to a simmer and cook until slightly reduced, 10 minutes. Sprinkle fresh parsley on buns and serve with au jus.
Ingredients

1 tablespoon unsalted butter

1 large garlic clove, minced

1 ½ cups beef broth

1 tablespoon Worcestershire sauce

1/2 teaspoon chopped thyme

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A hand dipping a keto French dip slider into a bowl of rich au jus gravy.

The easy homemade au jus (this is the part everyone asks about)

This au jus is embarrassingly simple. Beef broth, a splash of Worcestershire sauce, garlic, and herbs. That’s it.

But once it simmers and reduces slightly, it turns into something that tastes like it came from a restaurant. I always make extra because:

Everyone wants more for dipping
It reheats well
You’ll be tempted to sip it straight from the mug

No judgment.

Storage information

If you do have leftovers, store the sliders and au jus separately in airtight containers in the refrigerator for up to 3 days.

For reheating, skip the microwave if you can. The oven or air fryer works much better and helps keep the rolls from getting soggy. Warm them low and slow until heated through, then serve with reheated au jus on the side.

Can I make these ahead of time?

Short answer… not really.

Because these are meant to be dipped, they’re best eaten the same day. Once assembled, the rolls can absorb moisture and lose their texture. You can prep the components ahead of time though.

What works:

Caramelize the onions in advance
Make the au jus ahead and reheat
Slice the rolls and have everything ready

Then assemble and bake right before serving.

Keto French Dip Sliders: FAQS

Why are my sliders getting soggy?

This usually happens if the sliders sit too long after assembling. For best results, serve the au jus on the side and eat the sliders the same day they’re made.

My au jus tastes bland. How can I fix it?

A bland au jus usually just needs more concentration. Let it simmer a few extra minutes to reduce slightly, and adjust with a splash more Worcestershire sauce or a pinch of salt. Beef broth brands vary a lot, so seasoning to taste is key.

My onions aren’t caramelizing, they’re just soft.

This usually means the heat is too low or the pan is overcrowded. Caramelization takes time and space. Cook the onions over medium-low heat, stir occasionally, and let the moisture cook off so they can actually brown instead of steam.

How can I lower the carb count?

To make these sliders more keto-friendly, decrease the amount of onion used or omit it all together.

Nutritional information & Macros

Amount Per Serving
Calories	178
Fat	12.9g
Protein	13g
Total Carbs	12.4g
Net Carbs	1.2g

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About Annie Lampella, Pharm.D.

Annie Lampella is a Doctor of Pharmacy, mom, and the recipe creator behind KetoFocus. With a B.S. in Genetics from UC Davis and a Pharm.D., she has over 11 years of experience developing family-friendly keto recipes based on the science of human metabolism. She is the author of the Protein Packed cookbook, published by Victory Belt Publishing.

Learn more about Annie →

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