These ribs are meatier than baby-backs and tend to have fewer bones. Serve them with biscuits and cole slaw on the side.
1 small onion, finely chopped (1/2 cup)
1/2 cup ketchup
1/2 cup cider vinegar
1/4 cup brown sugar
1 tablespoon kosher salt
1 tablespoon Worcestershire sauce
1 chipotle en adobo, minced (these peppers come in a can in the Mexican aisle)
1 teaspoon dried oregano
4 pounds pork country ribs
Combine the onion, ketchup, vinegar, brown sugar, salt, Worcestershire, chili powder, and oregano in a 4- to 6-quart slow cooker. Stir in the ribs. Cook on low heat for 6 hours, or on high for 3 1/2 hours.
Using tongs, remove the ribs from the cooker and arrange on a broiler pan. Heat the broiler. Pour the juices from the cooker into a bowl and place in the freezer for 10 minutes to hasten the separation of the fat. Remove and discard the fat. Pour the defatted juices into a saucepan; boil over high heat until reduced by half, about 15 minutes. Broil the ribs about 6 inches from the heat until browned. Serve with the sauce.