Preheat the oven to 375°F (190°C). Grease a 9x13-inch casserole dish with olive oil.
In a bowl, combine enchilada sauce, sour cream, garlic powder, onion powder, cumin, chili powder, and salt and pepper. Stir until well mixed.
Spread a thin layer of the sauce mixture at the bottom of the casserole dish.
Layer torn corn tortillas on top of the sauce, followed by a layer of shredded chicken. Pour some sauce over the chicken and top with shredded cheese.
Repeat the layers until all ingredients are used, finishing with a layer of cheese on top.
Cover the casserole with aluminum foil and bake for 25-30 minutes.
Remove the foil and bake for an additional 10-15 minutes, or until the cheese is golden and bubbly.
Garnish with fresh cilantro, let cool for a few minutes, and serve. Enjoy!