Bring a pot of water to a boil and cook the macaroni according to package directions. Drain the pasta and return it back to the pot. Add the butter and stir until it’s melted into the pasta.
Toss the shredded cheese with the cornstarch until it’s evenly coated. Add the cheese with the cornstarch and evaporated milk to the pasta and stir. Turn the heat up to warm the sauce while the cheese melts. Keep stirring until the sauce thickens. Season the sauce with the mustard powder, chili flakes, and garlic powder.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.