Covered in a white sauce made from butter, flour, sour cream, chicken broth, cheese, and green chiles.
In a large bowl, mix the chicken, shredded cheese, onion, salt, and pepper together. Spoon this mixture onto warm tortillas and roll each to tightly close.
Begin making your white sauce by melting butter in a saucepan over medium heat. Add the flour and whisk until smooth.
Finish by pouring the white sauce over your prepared enchiladas along with the remaining cheese.
Bake for 30 minutes, garnish with cilantro, and enjoy!