Preheat your oven to 325°F.
Heat the olive oil in a large Dutch oven over medium-high heat.
Season the chicken breasts all over with salt, black pepper, smoked paprika, chili powder, garlic powder, onion powder, cumin, and crushed red pepper flakes.
Sear the chicken for 2–3 minutes per side until lightly golden (don't worry about cooking it through).
Pour the chicken broth and apple cider vinegar into the Dutch oven. Stir gently, scraping up any browned bits from the bottom.
Cover with the lid and transfer to the oven. Bake for 45–55 minutes. The chicken has to be very tender and easily pulls apart with two forks.
Remove the chicken from the Dutch oven. Shred the chicken using two forks.
Return the shredded chicken to the pot and stir it into the cooking juices to soak up all the flavor.
Serve hot, or use for sandwiches, tacos, salads, and more!