Cooking pot roast involves braising a chuck roast or other tough cut of beef in liquid until it becomes tender and flavorful. The cooking time can vary depending on the size and cut of the roast, as well as the cooking method used.
Slow cooking pot roast in a Dutch oven or slow cooker allows the meat to cook evenly and develop a rich flavor. When cooked this way, a 3-pound roast typically takes 6 to 8 hours on low heat or 4 to 6 hours on high heat.