Add the crushed tomatoes, chipotles in adobo (including the adobo), onion, green chiles, lime juice, garlic, salt, and chipotle powder to the blender. Blend until smooth, about 30 seconds to 1 minute.
Next, add a thin layer of vegetable oil to the crockpot (aim for about an eighth-inch of oil). Lay the chicken breast flat in the bottom of the crockpot in the oil, then pour the sauce from the blender over the chicken.
Cover the crockpot and cook on HIGH for about 4 hours, or until the chicken is tender.
Remove the chicken from the crockpot and shred with two forks. Return the shredded chicken to the crockpot, stirring it back into the sauce until combined.
Keep warm until ready to serve, or let cool and store in the fridge for up to 5 days.
Notes
Cooking chicken: We highly recommend having a digital meat thermometer around to accurately tell when the chicken is done cooking. Crockpot temperatures vary, so keep an eye on the chicken the first time you make this recipe as the cook time may vary.Serving suggestions: You can use this shredded chipotle chicken in so many ways! Make sandwiches or wraps, add it to a salad, burrito bowl, or quesadilla, use it for chipotle chicken tacos - you name it. Check out our blog post above for more suggestions, and let us know your favorite ways to use it in the comments!Storing & reheating: Store shredded chipotle chicken in the sauce in an air-tight container in the fridge for up to 5 days. Reheat single servings in the microwave for about 1 minute, stirring halfway through, or in a frying pan over medium heat for about 5 minutes. Or, use it cold on a sandwich!