Warming French Onion Roast

Featured in Family Dinners.

This French onion roast made dinner amazing! It simmers for about 6 hours, but you can let it do its thing. The beef gets so tender, and that onion gravy is a flavor bomb. Just use good-quality broth. Serve with mashed potatoes, and your family will adore it. Trust me, it's even yummier the next day.
A woman wearing an apron and smiling.
Updated on Mon, 21 Apr 2025 20:05:52 GMT
Juicy beef over creamy mashed potatoes, topped with onions and herbs for a perfect meal. Pin it
Juicy beef over creamy mashed potatoes, topped with onions and herbs for a perfect meal. | tasteofmoms.com

This French onion pot roast delivers homey warmth with each mouthful. Sweet caramelized onions and juicy beef create the ultimate cold-weather dish that's fantastic with mashed spuds or egg noodles.

Simple Delight

The marriage of pot roast and French onion flavors creates kitchen magic. Works in both crockpot and on stove, and honestly tastes even better the following day.

What You Need

  • Meat: Two-pound chuck roast, grab it fresh if possible.
  • Fats: Both butter and oil for that amazing sear.
  • Aromatics: Some garlic and a couple big onions.
  • Liquid: Beef broth forms your sauce foundation.
  • Flavor: Worcestershire, a splash of vinegar, and your favorite herbs and spices.
  • Thicken: Cornstarch for that velvety gravy finish.

Simple Instructions

Sear
Rub seasonings on beef, then brown in hot butter and oil until a nice crust develops.
Onions
Cut them into thin slices and put half in the bottom of your slow cooker.
Mix
Combine the garlic, stock, sauces, seasonings and herbs, then place beef on top of onion layer.
Cook
Set to low for six hours until the meat falls apart when poked.
Gravy
Take out the beef, then stir in cornstarch to thicken the sauce before serving.
A close-up image of tender braised beef topped with caramelized onions and fresh herbs in a black serving dish. Pin it
A close-up image of tender braised beef topped with caramelized onions and fresh herbs in a black serving dish. | tasteofmoms.com

Stay Fresh

Keeps in fridge up to four days, or stash in the freezer for later. Warm it slowly to maintain tenderness, and try it in sandwiches or soups too.

Top Tips

Don't skimp on seasoning and use a good heavy pan. Give the meat room to brown properly and watch your heat level to avoid burning the fats.

Crowd Pleaser

Simply double everything and use a bigger slow cooker for gatherings. Serve with some spuds and soft rolls for a complete feast everyone will love.

Fan Favorite

This savory one-pot wonder means minimal cleanup after dinner. The fall-apart meat and sweet onion sauce brings total comfort to your table.

Great Sidekicks

Fluffy mashed potatoes or wide egg noodles soak up all that gravy goodness. Add a veggie side, green salad or crusty bread to round things out.

Twist It Up

Toss in some mushrooms, chunky carrots or swap in some red wine and fresh herbs. You can easily tweak this dish to match what you like.

A succulent, sliced roast beef garnished with caramelized onions and thyme in a black cooking pot. Pin it
A succulent, sliced roast beef garnished with caramelized onions and thyme in a black cooking pot. | tasteofmoms.com

Get Ahead

Do all your prep the evening before and start cooking in the morning for a dinner that's ready when you are. Warm up leftovers for quick meals during your busy week.

Total Comfort

Just right for frosty evenings or family get-togethers. The deep flavors and no-fuss cooking will put smiles on everyone's faces.

Frequently Asked Questions

→ Can I use both the oven and slow cooker for this?
You sure can! The slow cooker method takes 6-8 hours on low. For the oven, set it at 275°F and cook for 2.5-3 hours.
→ Why should I sear the beef first?
Browning the meat adds so much flavor and also makes the texture even better by locking in those juices.
→ How do I know it's finished cooking?
You'll know it's done when the beef falls apart when you test it with a fork. On a slow cooker, this happens around 8 hours on low.
→ Can I make a bigger portion?
Yes! You just need a 6-8 quart slow cooker to handle more. Remember to scale up cooking times if you’re doubling it.
→ Why add cornstarch at the end?
Mixing cornstarch at the end thickens the gravy. Add as much as needed for the thickness you want.

Conclusion

A melt-in-your-mouth beef dish inspired by French onion soup, slowly cooked and served with a savory, rich gravy.

French Onion Pot Roast

Beef slow-cooked with sweet onions and hearty gravy until it's melt-in-your-mouth tender. Perfect for chilly nights!

Prep Time
10 Minutes
Cook Time
495 Minutes
Total Time
505 Minutes
By: Ashley

Category: Family Dinners

Difficulty: Intermediate

Cuisine: American

Yield: 5 Servings (1 full roast)

Dietary: Low-Carb, Gluten-Free

Ingredients

01 2 tbsp butter.
02 1 bay leaf.
03 ½ tsp dried thyme.
04 2 lbs chuck roast.
05 Splash of cooking oil.
06 3 minced garlic cloves.
07 ½ tsp onion powder.
08 ⅛ tsp celery seeds.
09 1 tbsp sugar.
10 1 tbsp Worcestershire sauce.
11 2 large thinly sliced onions.
12 2 cups beef stock.
13 ⅓ cup water.
14 1 tbsp apple cider vinegar.
15 2-3 tbsp cornstarch.

Instructions

Step 01

Generously season the roast with salt and pepper. Brown it on all sides in a hot pan with the butter and oil.

Step 02

Cook onions in the same pan for a few minutes till they're a little soft.

Step 03

In layers, set half the onions, garlic, spices, the roast, and then the remaining onion. Let it go on low for 6-8 hours.

Step 04

Mix everything in a Dutch pot. Bake in the oven at 275°F for 2 ½ to 3 hours till it's fork-tender.

Step 05

Take out the roast. Whisk the cornstarch and liquid together, cooking until it gets as thick as you'd like.

Notes

  1. Works in an oven or a slow cooker.
  2. Browning the roast gives deeper flavor.
  3. Bigger roasts need a larger slow cooker.

Tools You'll Need

  • Dutch pot or slow cooker.
  • Big frying pan.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 450
  • Total Fat: 28 g
  • Total Carbohydrate: 12 g
  • Protein: 42 g