Instructions

  1. Place roast in a 3 1/2 or 4 quart electric slow cooker; add onion.
  2. Combine cola and next 7 ingredients; cover and chill 1 cup sauce.
  3. Pour remaining sauce over raost.
  4. Cover with lid; cook on High for 1 hour.
  5. Reduce heat to Low; cook 8 hours or until roast is very tender.
  6. If time doesn't permit, you can omit cooking it on High for 1 hour.
  7. Just add two hours to the Low cooking time.
  8. Remove roast with chopped onion from cooker using a slotted spoon and shred meat with 2 forks.
  9. Combine reserved sauce, ketchup and butter in a saucepan; cook over medium heat, stirring constantly, until thoroughly heated.
  10. Pour sauce over shredded meat, stirring gently.
  11. Spoon meat mixture on buns.