For a richer flavor, sear the beef roast in a hot skillet before placing it in the slow cooker. This will create a beautiful crust and enhance the depth of flavor. If you prefer a thicker sauce, whisk together 1 tablespoon of cornstarch with 2 tablespoons of cold water. Stir the slurry into the slow cooker during the last 30 minutes of cooking. The leftover shredded beef is fantastic in sandwiches, tacos, or served over mashed potatoes. Feel free to add other vegetables to the slow cooker, such as carrots, potatoes, or celery, for a more complete meal.
Mushroom Slow Cooker Roast Beef
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PREP TIME5 mins
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COOK TIME9 hrs
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TOTAL TIME9 hrs 5 mins
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SERVING8 People
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VIEWS1.5K
Transform an ordinary roast into a succulent, deeply flavorful masterpiece with this slow-cooked marvel. Earthy mushrooms meld with tender beef, creating a rich and unforgettable culinary experience. Perfect for a cozy family dinner or an impressive gathering.
Ingridients
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Nutrition
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Carbohydrate6 g
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Cholesterol83 mg
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Fiber1 g
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Protein24 g
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Saturated Fat11 g
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Sodium453 mg
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Sugar1 g
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Fat28 g
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Unsaturated Fat0 g
DIRECTIONS
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01 Step
Recipe View Prepare the base: Arrange the sliced mushrooms evenly across the bottom of a slow cooker. (5 minutes)
02 Step
Recipe View Layer the roast: Place the beef rib roast directly on top of the mushroom bed. (2 minutes)
03 Step
Recipe View Season and infuse: Sprinkle the onion soup mix generously over the beef roast, ensuring an even coating. Then, slowly pour the dark beer over the roast and mushrooms. Season liberally with freshly ground black pepper. (3 minutes)
04 Step
Recipe View Slow cook to perfection: Cover the slow cooker and cook on Low for 9 to 10 hours, or until the beef is incredibly tender and easily pulls apart with a fork. (9-10 hours)
05 Step
Recipe View Serve and savor: Carefully remove the roast from the slow cooker. Let it rest for 15 minutes before carving or shredding. Serve with the flavorful mushroom sauce from the slow cooker. (20 minutes)
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RECIPE REVIEWS
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Princess Aufderhar
Apr 18, 2025Easy to follow recipe and the result was amazing!
Estella Homenick
Oct 23, 2024The dark beer made all the difference! I'll never make roast beef without it again.
Roderick Weimann
Jul 19, 2024I used a chuck roast instead and it was still incredibly tender and delicious.
Meta Lynch
Sep 25, 2023This was the best roast beef I've ever made! The mushrooms added so much flavor.
Dayna Gutkowski
Jan 27, 2023My family loved this! It's going into our regular rotation.
Jacinthe Heathcote
Oct 23, 2022The cheesesteak leftovers were a huge hit!
Alexzander Lubowitz
Mar 11, 2022I added some carrots and potatoes to the slow cooker and it made a complete meal.