Ingredients for - Mushroom Slow Cooker Roast Beef

1. Sliced fresh mushrooms 1 pound
2. Standing beef rib roast 1 (4 pound)
3. Onion soup mix 1 (1.25 ounce) envelope
4. Beer 1 (12 fluid ounce) bottle
5. Ground black pepper 1 (12 fluid ounce) bottle

How to cook deliciously - Mushroom Slow Cooker Roast Beef

1 . Stage

Place the mushrooms in the bottom of a slow cooker; set the roast atop the mushrooms; sprinkle the onion soup mix over the beef and pour the beer over everything; season with black pepper. Set slow cooker to LOW; cook 9 to 10 hours until the meat is easily pulled apart with a fork.