Preheat the oven to 350 degrees F.
In a small bowl, combine chicken, 1 cup cheese, chiles, salt, and pepper.
In a small skillet, bring enchilada sauce to a boil, then lower temperature and bring to a simmer.
Dip each tortilla into heated sauce for a few seconds to soften.
Place a tortilla in a 9x11 inch baking dish and spoon ⅓ cup of chicken mixture and 2 tablespoons sour cream down the center. (NOTE: The squeeze sour cream works great.)
Roll the tortilla and place seam-side down.
Repeat with remaining tortillas. Pour enough sauce to cover the enchiladas. Sprinkle with the remaining 1 cup of cheese.
Bake uncovered for 20 minutes, or until cheese is melted and bubbly.