High for 3 to 4 hours low for 8 to 9 hours
1 Pour onion and mushroom mixture over the top of the roast. 2  Cover slow cooker, turn to high and cook the roast for 5-6 hours, until the meat is fork tender. 3  Skim off any fat from the surface and remove the bones. 4  Season with salt and pepper to taste. 1 Stir in onion; cook for 5 minutes, until onions are translucent and begin to brown. 2  Add garlic, stir for about a minute. 3  Stir in 1 1/2 tablespoons flour; cook and stir for about 1 minute. If a pan with a rack is not available, place the meat on sturdy foods such as potatoes or carrots to keep it from getting too wet. 5. Turn the oven down to 200ºF and cook for about 1 hour per pound. Check your meat with a thermometer after 2.5 hours for a 2.5 pound roast. Follow these guidelines for doneness when checking temperature 1  : 130ºF Rare. Cook the roast on low for about 5-7 hours. Cook your meat for about 2 hours per pound of weight. Depending on the size of your roast you will need to adjust the cooking time. Add the beef broth, bay leaves, thyme, allspice, 1/2 teaspoon salt and a few grinds of pepper and bring to a simmer, whisking, until the gravy is smooth and thickens slightly, about 4 minutes. Pour the gravy into the slow cooker. Cover and cook on low for 8 hours. The roast and vegetables should be tender. Add the roast to the skillet and cook until golden brown on all sides, about 8 minutes, turning as needed. Transfer the roast to the insert of a 6-quart slow cooker, along with the carrots, celery, onions and garlic. Add the remaining 1 tablespoon oil to the skillet over medium heat. Watch: How to Cut Onion Wedges. Sprinkle roast with 1 teaspoon salt and 1/2 teaspoon pepper; place on top of vegetables, and drizzle with Worcestershire. Cover; cook on high, 6 hours (or on low, 10 hours). Transfer roast to a cutting board; thinly slice against the grain.  Sprinkle the roast all over with 2 1/2 teaspoons salt and 1 1/2 teaspoons pepper. Coat in flour and shake off any excess. Heat 2 tablespoons of the oil in a large nonstick skillet over medium-high heat. Add the roast to the skillet and cook until golden brown on all sides, about 8 minutes, turning as needed. Transfer the roast to the insert of a 6-quart slow cooker, along with the carrots, celery, onions and garlic. Add the remaining 1 tablespoon oil to the skillet over medium heat. 1 Place beef round roast in slow cooker, then add carrots, onion, and celery. 2  Season with garlic powder and black pepper. 3  Pour Worcestershire and barbeque sauce over meat and vegetables. 4  Cook on Low until the meat is tender, 6 to 8 hours.  If you are not in a hurry, use the low setting. A 4 lb. roast will take a total of 6 to 8 hours total cooking time on low. The cooking time will depend on your slow cooker model and its age; the older the model, the closer to the 8-hour cooking time your roast will be. To brown the roast before cooking, preheat a heavy pan over medium-high heat. Add enough oil to coat the bottom of the pan. Flour the roast, if desired, and place the roast into the hot oil. Brown the roast on all sides, then remove it to the slow cooker to finish cooking. In slow cooker, mix cream ... mix and water. Place roast in slow cooker and coat with soup mixture. Cook on high for 3 to 4 hours or low for 8 to 9 hours.  1. Rub roasts evenly with 1 tsp. salt and 1 tsp. pepper. 2. Brown roasts on all sides in hot oil in a Dutch oven over medium-high heat (about 10 minutes). Place roasts, side by side, in a 6-qt. slow cooker. Add carrots and remaining ingredients. 3. Cook, covered, on LOW 10 to 12 hours or until tender. Remove roast and vegetables, and shred meat. Pour gravy mixture from slow cooker into a 4-cup measuring cup or fat strainer, and let stand 15 minutes. Spoon or pour fat out of gravy mixture in cup or fat strainer, and discard.  Place roast in Crockpot. Add water, spices and soup mix. Cook 4 hours on med-high for a 2-lb roast, and 1 additional hour per pound, up to approximately 8 hours. As long as moisture remains in the pot, there is no danger of overcooking. 
http://allrecipes.com/recipe/220125/slow-cooker-beef-pot-roast/ http://www.wikihow.com/Slow-Cook-a-Roast http://www.foodnetwork.com/recipes/food-network-kitchens/slow-cooker-pot-roast.html#! http://www.marthastewart.com/313619/slow-cooker-pot-roast http://www.foodnetwork.com/recipes/food-network-kitchens/slow-cooker-pot-roast.html#! http://allrecipes.com/recipe/155154/slow-cooker-beef-roast/ http://www.ehow.com/way_5407377_long-cook-roast-slow-cooker.html http://www.cooks.com/rec/search/0,1-0,2_lb_roast_slow_cooker,FF.html http://www.myrecipes.com/recipe/slow-cooker-chuck-roast http://www.cooks.com/recipe/pa48i8bo/slow-cooker-roast-pork.html
how long to cook a roast in slow cooker