01 -
Preheat the oven to 350°F. Lightly grease a 9x13-inch baking dish.
02 -
Lightly crush the Doritos into rough bite-size pieces. Set aside about 2 cups for the topping.
03 -
In a large bowl, stir together the chicken, cream of chicken soup, cream of mushroom soup, sour cream, salsa, corn, taco seasoning, and 1 cup of the Mexican cheese blend until evenly combined.
04 -
Scatter the remaining crushed Doritos over the bottom of the baking dish. Spread the chicken filling evenly over the chips.
05 -
Bake uncovered for 20 minutes, until the edges are bubbling and the center is hot.
06 -
Sprinkle the reserved Doritos, remaining 1 cup Mexican cheese blend, and cheddar over the top. Bake for 8-10 minutes more, until the cheese melts and the chips are lightly toasted.
07 -
Let the casserole rest for 5 minutes. Top with cilantro or green onions if using, then serve hot with extra salsa or sour cream.