1. Place spareribs in slow cooker. Mix Seasoning, brown sugar, vinegar and ketchup until blended. Pour over spareribs. Cover.
2. Cook 8 hours on LOW or 4 hours on HIGH.
3. To serve, remove spareribs from slow cooker; keep warm. Transfer sauce to measuring cup. Drain off fat. Serve sauce over spareribs.
Test Kitchen Tip: Use 1 can (8 ounces) tomato sauce in place of the ketchup; omit cider vinegar.
Slow Cooker Tip: For best results, do not remove cover during cooking.