Step 1

Preheat the oven to 350° F and lightly grease a 9×13 baking dish.

Step 2

Sprinkle the chicken breasts on each side with the salt and black pepper. Heat the oil in a large cast-iron or ovenproof skillet set on medium heat. When it shimmers, add the chicken and cook on each side for 3 minutes.

Step 3

Place the chicken in the oven and bake uncovered for 25 minutes or until an inserted thermometer is 165°F. When the chicken is done, remove it from the oven, keeping the oven on since you'll be using it again.

Step 4

Allow the chicken to cool, and then shred it with 2 forks. Taste the shredded chicken and add more salt and pepper if desired.

Step 5

Meanwhile, to make the sauce, in a medium pot melt the butter on medium-low. Add the tomatillos and diced Serrano chiles and while occasionally stirring, cook until soft, about 4-5 minutes. Add the minced garlic and cook for 30 seconds.

Step 6

Whisk in the flour, cumin, salt, and cayenne and cook for 1 more minute or until lightly toasted and fragrant. Pour the chicken broth into the pot, and while whisking, cook until the broth has thickened, about 2-3 minutes. Stir in the sour cream and cilantro, then remove from the heat.

Step 7

Pour the sour cream sauce into a blender and puree until smooth. Taste and adjust seasonings.

Step 8

To make the enchiladas, pour the oil into a 9x13 baking dish or large cast-iron skillet. To quickly warm the tortillas, place them in the dish (it’s okay if they overlap) and make sure they get covered in the oil. Place the pan uncovered in the oven for 5 minutes or until the tortillas are soft and warm.

Step 9

Remove the tortillas from the baking dish and keep them covered. Pour 1 cup of the sour cream sauce into the bottom of the dish.

Step 10

To assemble the enchiladas, take each corn tortilla and place in the middle 1/3 cup of shredded chicken, 1 teaspoon of diced onions, and 1 tablespoon of cheese (I’m not usually this scientific but if you’ve never made them before and desire exact measurements this would be it!).

Step 11

Roll the tortillas around the filling and place the rolled tortillas seam side down in the casserole dish. Cover the enchiladas with the remaining sauce and cheese and bake for 25 minutes or until the the top is brown and bubbling.

Step 12

Serve warm topped with chopped cilantro.