If you prefer, you can cook the meat in a slow cooker or crockpot. After marinating in the rub, add the racks to your slow cooker and cook on low for eight hours or on high for four hours. When the ribs are done, remove them from the slow cooker and place them on a rimmed baking sheet. Brush on your favorite barbecue sauce and bake at 350 degrees for an additional 30 minutes or until the barbecue sauce caramelizes.