Preheat Your Oven: Set it to 350°F (175°C). Grease a 9×13-inch baking dish and set aside.
Make The Chicken Mixture: In a large bowl, combine the shredded chicken, chopped bacon, ranch dressing, and 1 cup of shredded cheddar cheese. Mix until everything is coated and creamy.
Fill The Tortillas: Lay out your tortillas and evenly spoon the chicken mixture into the center of each one. Seam side down, roll them firmly, and put them in the baking dish that has been prepared.
Prepare The Sauce: In a saucepan, melt the butter over medium heat. Stir in the flour and whisk for about a minute to form a roux. Gradually pour in the chicken broth, whisking continuously to avoid lumps. Let the sauce simmer until it thickens slightly.
Add The Creamy Goodness: Remove the sauce from heat and stir in the sour cream, taco seasoning, and diced green chilies. Pour this creamy sauce evenly over the enchiladas in the baking dish.
Top With Cheese: Sprinkle the remaining shredded cheddar cheese over the top of the enchiladas. This will give it that delicious golden-brown cheesy layer!
Bake To Perfection: Bake the enchiladas for about 25-30 minutes, or until the cheese is bubbly and lightly golden.
Serve Hot: Let the enchiladas rest for a few minutes before serving. This will facilitate setting and simplify slicing.