Preheat oven to 400F.

Bring a large pot of water to a boil and cook the pasta. If you're using Ready Pasta, skip this step. 

Cut the chicken into bite size pieces and add to a bowl with the olive oil, half a packet of ranch seasoning, and chili powder. Toss/stir until the chicken is evenly coated. 

Heat a large skillet over medium-high heat. When the skillet is hot, add the chicken and cook for 4-5 minutes untouched (until the bottoms have a slightly crispy layer) before flipping and cooking for another 2-3 minutes. 

When the chicken is fully cooked, add the cheese sauce ingredients (except the pasta) to the skillet and stir until the cheese melts and everything is mixed evenly. 

Once the cheese sauce is evenly mixed, add the cooked pasta and stir once more. Transfer the mac and cheese to a baking dish or continue to the next step if you're using an oven safe skillet. 

Microwave the remaining 2 tablespoons of butter for 10 seconds before mixing with the Corn Flakes. Fold the melted butter into the cereal until it's evenly coated. Top the mac and cheese with the Corn Flakes mixture.

Bake for 12-15 minutes or until the topping is golden brown.