This slow cooker onion soup pot roast is a reliable, comforting meal that’s both easy and satisfying. Using a packet of dry onion soup mix or a can of French onion soup together with condensed cream of mushroom soup creates a savory sauce that turns a chuck roast tender as it cooks. Potatoes and carrots simmer alongside the beef, soaking up the rich juices for a complete one-pot dinner.
It’s a true set-it-and-forget-it recipe—ideal for busy weekdays or relaxed weekends when you want a hearty dinner waiting at the end of the day. Leftovers reheat well, and you can thicken the cooking liquid on the stovetop to make a rich gravy if you prefer.
What You’ll Like About This Dish
Hands-off cooking. The slow cooker does the work while you go about your day.
Deep, savory flavor. Onion soup mix or canned French onion soup adds robust onion and beef notes.
Complete meal in one pot. The roast, potatoes, and carrots cook together for an easy cleanup.
Consistently tender. Slow cooking makes the chuck roast melt-in-your-mouth tender.
Ingredient Notes
- Chuck roast – A great choice for slow cooking because it becomes very tender and flavorful.
- Red potatoes – Hold their shape during long cooking, especially when halved.
- Carrots – Add natural sweetness and color.
- Condensed cream of mushroom soup – Forms a creamy base for the cooking liquid.
- French onion soup or onion soup mix – Either provides the deep onion flavor central to this dish.
- Cornstarch or flour – Optional, to thicken the sauce into gravy after cooking.
Steps to Make Slow Cooker Onion Soup Pot Roast
- Place the roast in the slow cooker.
- Arrange the potatoes and carrots around the meat.
- Mix the cream of mushroom soup, onion soup mix (or canned French onion soup) and beef broth; pour over the roast and vegetables.
- Cover and cook on HIGH for about 1 hour, then turn to LOW.
- Cook on LOW for 6 to 8 hours, or until the roast is very tender.
- Skim fat from the cooking liquids or pour them into a fat separator.
- Bring the defatted liquids to a boil on the stovetop to concentrate the flavors.
- Thicken the sauce with a cornstarch slurry or a flour-based roux if desired.
Tips
Sear the roast briefly in a hot skillet before slow cooking to boost flavor, if you have time.
Cut the potatoes in half so they cook evenly and absorb more flavor.
Use low-sodium broths and soups if you want to control the salt level.
If you prefer a gravy, thicken the strained cooking liquid with a cornstarch slurry (cold water plus cornstarch) or whisk in a roux.
Recipe Variations
- Golden mushroom version. Substitute golden mushroom soup for cream of mushroom.
- Herb version. Add fresh or dried thyme, rosemary, or a bay leaf or two for extra aroma.
- Vegetable-forward. Add onions, celery, parsnips, or other root vegetables to the pot.
- Wine-enhanced. Add a splash of red wine with the broth for deeper flavor.
- Garlic boost. Toss in several whole peeled garlic cloves for a mellow roasted garlic note.
Serving Suggestions
- Serve the roast with the cooked vegetables and a ladle of the thickened sauce.
- Add a side of green beans, peas, or a simple salad for color and freshness.
- Pair with crusty bread, dinner rolls, or mashed potatoes to soak up the juices.
- Garnish with chopped fresh parsley for brightness.
How to Store
Refrigerate leftovers in an airtight container for up to 4 days. Reheat gently on the stovetop or in the microwave, adding a splash of broth if the sauce has thickened too much.
Freeze the pot roast (without the potatoes) for up to 3 months; add fresh potatoes when reheating for the best texture.
Slow Cooker Onion Soup Pot Roast
Diana Rattray
Ingredients
- 3 pounds beef chuck roast
- 2 to 3 pounds small red potatoes, scrubbed, halved
- 4 large carrots, peeled, halved lengthwise and cut into 3-inch pieces
- 1 (10.5-ounce) can cream of mushroom soup
- 1 (1-ounce) packet onion soup mix, or substitute a 10.5-ounce can of condensed French onion soup
- 1 cup beef broth, low sodium recommended
- 1 tbsp cornstarch, optional, for thickening
- 1 tbsp cold water, optional, to make a slurry
Recommended Equipment
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6-quart slow cooker
Instructions
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Place the pot roast in the slow cooker.
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Arrange the potatoes and carrots around the roast.
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Combine the cream of mushroom soup, onion soup mix (or condensed French onion soup) and beef broth. Pour the mixture over the roast and vegetables.
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Cover and cook on HIGH for 1 hour, then reduce to LOW and cook for 6 to 8 more hours, or until the roast is very tender.
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Skim fat from the cooking liquid or pour into a fat separator. Return the defatted liquid to a saucepan and boil over medium-high heat until slightly reduced and flavors are concentrated, about 2 to 4 minutes.
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Optional: To thicken, mix 1 tablespoon cornstarch with 1 tablespoon cold water until smooth. Stir into the boiling liquid and cook until thickened.
Notes
Nutrition
Disclaimer:
Nutritional information is an estimate based on ingredient data and may vary with brands, measurements, and serving sizes.