BettyCrocker.com and Food.com both feature recipes for cooking barbecue ribs in a Crock-Pot. Both recipes take about 10 hours to cook. The addition of liquid smoke to either recipe gives the taste of cooking the ribs in a smoker.
To make the recipe from Food.com, gather 3 pounds of pork spareribs, salt, pepper, barbecue sauce and a chopped onion. Rub the ribs with the salt and pepper before adding them to the Crock-Pot on low heat. Dump in the barbecue sauce and onion, and let the ribs cook. The resulting product should fall right off the bone.
The recipe on BettyCrocker.com calls for the addition of sweet ingredients, such as cola and brown sugar. The recipe also adds some garlic. Prepare the ribs the same way as the Food.com recipe, making sure to add the additional ingredients with the barbecue sauce.