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Crock Pot Beef Roast – Mushroom Sauce

🥩 Fork-tender beef roast + creamy mushroom gravy = dinner perfection.
Course Main
Cuisine American
Keyword crock pot beef roast recipe,, mushroom sauce, slow cooker beef roast
Prep Time 20 minutes
Cook Time 8 hours
Total Time 8 hours 20 minutes
Servings 6 plates

Ingredients

  • 2½ pounds chuck roast grass-fed if available
  • 1 package button mushrooms cleaned and sliced
  • 1 cup baby carrots
  • 1 cup chopped celery
  • 1 to 1½ cups chopped onion
  • 2 cups beef or chicken broth
  • 1 tablespoon tomato paste
  • 1 tablespoon Worcestershire sauce
  • 1 can cream of mushroom soup
  • 2 –3 tablespoons flour mixed with 3 tablespoons water slurry
  • ¼ teaspoon salt
  • ½ teaspoon black pepper
  • 1 tablespoon parsley
  • 1 bay leaf
  • Olive oil for searing

Instructions

Step 1: Let the Beef Rest

  • Remove the chuck roast from the refrigerator and allow it to sit at room temperature for about 30 minutes. This helps it cook evenly.

Step 2: Season the Roast

  • Rub both sides of the roast with salt, black pepper, and a drizzle of olive oil. Press the seasoning in gently.

Step 3: Sear for Deep Flavor

  • Heat a skillet over medium-high heat. Sear the roast for 3–4 minutes on each side until a rich brown crust forms. Don’t skip this step. I’ve tried it once in a rush, and while it was still good, it didn’t have that same depth of flavor. The caramelization really matters.

Step 4: Transfer to Slow Cooker

  • Place the browned roast into the slow cooker.

Step 5: Add Vegetables and Sauce

  • Arrange mushrooms, carrots, celery, and onion around the roast.
  • In a bowl, whisk together the broth, tomato paste, Worcestershire sauce, and cream of mushroom soup. Pour the mixture over the meat and vegetables. Add parsley and bay leaf.
  • Give everything a gentle stir along the edges.

Step 6: Slow Cook

  • Cook on HIGH for 4–5 hours, or
  • Cook on LOW for 8 hours
  • The roast is done when it easily pulls apart with a fork and feels tender all the way through.

Step 7: Thicken the Mushroom Sauce

  • About 20–30 minutes before serving, stir in the flour slurry. Cover again and allow the sauce to thicken. Remove the bay leaf before serving.

Notes

Serve this beef roast over mashed potatoes, buttered egg noodles, or rice. The creamy mushroom gravy is too good to waste, so make sure there’s something underneath to soak it up.
Leftovers are just as good the next day. I like shredding the beef and spooning extra gravy over warm rolls for an easy sandwich.