Place a large pot or saute pan with a lid over medium high heat. Add in olive oil and onions and saute for 3 minutes. Next up add in garlic and sauce for 1 minute.
Toss in chopped chipotle peppers, adobo sauce, cumin, oregano, hot sauce, crushed tomatoes, and stock. Stir and bring to a simmer.
Once you reach a simmer, lower the temperature to low, add the chicken breasts, and cover with a lid. Simmer for 8-12 minutes or until you fully cook the chicken.
Once chicken is cooked through, remove from sauce and place on a baking sheet. Using two forks, shred the chicken.
Pour sauce into a blender and carefully blend until smooth. Return sauce and chicken to pan and cook over medium heat for 5 minutes. Season with salt and adjust seasoning if needed.
Build your tacos and enjoy! Be sure to heat your tortillas for best results 🙂