In a large pot of boiling salted water, cook the pasta until al dente, then drain.
While the pasta is cooking, in a medium saucepan, heat the oil over medium high heat until hot, then whisk in the flour and cook, whisking, until the flour is fragrant, about 4 minutes. Whisk in the milk and 1/2 teaspoon each salt and pepper, then bring to a boil, whisking. Boil until the milk is slightly thickened, about 8 minutes. Remove from the heat and whisk in 1 1/2 cups of the cheddar and the parmesan cheeses until melted, then whisk in the chicken. Season the sauce with salt and pepper to taste. Toss the pasta together with the sauce and transfer to a 3-quart baking dish and sprinkle with the remaining 1/2 cup cheddar cheese.
Bake the mac and cheese until the filling is bubbling, 25 to 30 minutes. Serve.
You May Like
Sign Up for Our Newsletter
Keeping you in the know on all the latest & greatest food and travel news, and other special offers.