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French Onion Pot Roast

A comforting slow cooker pot roast featuring tender beef, caramelized onions, and a rich, savory gravy that's perfect for easy dinners.
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Prep Time 15 minutes
Cook Time 9 hours
Total Time 9 hours 15 minutes
Servings: 8 servings
Course: Dinner, Main Course
Cuisine: Comfort Food, French
Calories: 450
Ingredients Method Notes

Ingredients
  

Main Ingredients
  • 3 to 4 pounds chuck roast Look for good marbling.
  • 2 tablespoons olive oil or butter
  • 4 large yellow onions, thinly sliced Yellow onions caramelize beautifully, but sweet onions also work.
  • 1 tablespoon Worcestershire sauce
  • 2 cloves garlic, minced
  • 1 teaspoon dried thyme Or 2 teaspoons fresh.
  • 1 cup beef broth Low sodium preferred.
  • 1 packet onion soup mix Or 2 teaspoons beef bouillon paste.
  • 1 tablespoon balsamic vinegar Optional, for brightness.
  • to taste Salt and black pepper
  • 2 tablespoons cornstarch Plus 2 tablespoons water (optional, for thickening).
  • to taste fresh parsley for garnish Optional.

Method
 

Sear and Build Flavor
  1. Pat the chuck roast dry and season generously with salt and pepper.
  2. Warm a skillet over medium-high heat with olive oil or butter.
  3. Sear the roast for about 3 minutes per side until golden. Transfer to the slow cooker.
  4. In the same skillet, add the sliced onions with a pinch of salt and cook for 5 to 8 minutes, stirring occasionally, until they soften and begin to color.
  5. Toss in garlic and thyme for the last minute.
  6. Deglaze the skillet with a splash of beef broth and Worcestershire, scraping up the browned bits.
  7. Pour everything over the roast. If using onion soup mix or bouillon, whisk it into the remaining broth and add to the slow cooker.
  8. Drizzle in the balsamic if you’re using it.
Slow Cook
  1. Cook on Low for 8 to 9 hours or on High for 4.5 to 5 hours, until the roast easily pulls apart with a fork.
  2. If you’re around, give the onions a gentle stir halfway through to make sure they’re submerged and mingling with the juices.
  3. When done, remove the roast to a cutting board and let it rest for 10 minutes.
Finish and Serve
  1. If you want a thicker gravy, whisk the cornstarch with water and stir it into the onion liquid in the slow cooker.
  2. Cover and cook on High for 10 to 15 minutes until glossy. Taste and adjust salt and pepper.
  3. Spoon the onions and gravy over the sliced or shredded beef.
  4. Serve with mashed potatoes, buttered noodles, roasted carrots, or crusty bread to soak up every drop.
  5. Sprinkle with chopped parsley and crack a little fresh pepper over the top.

Notes

Make ahead by preparing the roast a day in advance. Store leftovers in the fridge for up to 4 days or freeze for up to 3 months. Reheat gently with a splash of broth. Consider adding mushrooms or swapping thyme for rosemary for variations.