Set your oven to preheat at 350°F (175°C).
In a mixing bowl, toss the shredded chicken with ¼ cup of enchilada sauce, seasoning generously with salt and black pepper. Taste and adjust seasoning as needed.
For corn tortillas: wrap them in a damp paper towel and warm in the microwave for 1 minute, turning them midway to ensure flexibility.
For flour tortillas: stack and microwave on a plate for 1 minute, flipping once halfway through to warm them thoroughly.
To assemble, distribute the chicken mixture evenly across each tortilla. Sprinkle approximately 1 cup of shredded cheese over the filling. Roll each tortilla snugly and lay them seam-side down in a large oven-safe dish.
Evenly pour the remaining 1¾ cups of enchilada sauce over the arranged tortillas. Top with the rest of the cheese (about 1½ cups).
Place the baking dish in the oven and bake uncovered for 20 minutes, or until the cheese is fully melted and begins to bubble.
Serve promptly and embellish with your choice of garnishes.