01 -
Combine chili powder, onion powder, salt, cumin, garlic powder, black pepper, cayenne and paprika in bowl.
02 -
Whisk beef broth and tomato paste together.
03 -
Place roast in slow cooker. Rub spice mixture all over meat.
04 -
Pour broth mixture over the seasoned meat.
05 -
Cover and cook on low 8 hours until fork tender.
06 -
Remove meat, shred with forks discarding fat. Return to pot with lime juice.