Preheat your oven to 350°F (180°C). Lightly grease a 9x13-inch baking dish with nonstick spray and set aside.
In a medium bowl, combine the shredded chicken with 1 cup of Monterey Jack cheese. Tip: If your chicken is unseasoned, feel free to add a pinch of salt and pepper.
3 cups fully cooked rotisserie chicken, 3 cups Monterey Jack cheese
Spoon the chicken mixture down the center of each tortilla. Roll up tightly and place seam-side down in the prepared baking dish.
8 taco-size
In a large skillet, melt the butter over medium heat. Whisk in the flour and cook for about 1 minute to form a roux. Gradually whisk in the chicken broth and cook for 3–5 minutes, stirring often, until thickened and bubbly.
3 tablespoons butter, 3 tablespoons all-purpose flour, 2 cups chicken broth
Remove from heat and let the sauce cool for about 5 minutes. Then whisk in the sour cream and diced green chiles until smooth. Pour the white sauce evenly over the enchiladas. Sprinkle the remaining 2 cups of Monterey Jack cheese on top.
1 cup sour cream, 4 ounces can diced green chilies
Bake uncovered for 20–25 minutes, or until the cheese is melted and just starting to turn golden brown.
Remove from the oven and let rest for 5 minutes. Garnish with your favorite toppings like chopped green onions, fresh herbs, guacamole, or salsa.
Green onions, Parsley or cilantro, Guacamole, Salsa or pico de gallo