Add everything except sour cream
Place chicken, tomatoes, onion, jalapeños, butter, taco seasoning, salt, and chicken broth directly into the crockpot.
Cook
LOW: 6–7 hours
HIGH: 3–4 hours
Shred the chicken
Remove chicken, shred with two forks, and return it to the crockpot.
Make it creamy
Stir in sour cream. Cover and cook an additional 10–15 minutes on LOW, just until warmed through.
Do not boil once sour cream is added.
Serve & enjoy
Ladle into bowls and add your favorite toppings.