01 -
Shred the mozzarella, Colby Jack, and sharp cheddar from blocks. Toss them together, then divide the cheese mixture into two equal portions.
02 -
Bring a large pot of salted water to a boil. Cook the cavatappi until just al dente, usually 1 minute less than the package time, then drain well.
03 -
Heat the oven to 375 F. In a large heavy pot, melt the butter over medium heat. Whisk in the flour and cook for 1-2 minutes until smooth and lightly nutty.
04 -
Slowly whisk in the evaporated milk until smooth. Add the heavy cream and whisk until the sauce is hot, lightly thickened, and just starting to bubble.
05 -
Lower the heat to medium-low. Add half of the shredded cheese mixture by small handfuls, whisking until each handful melts before adding more.
06 -
Whisk in Dijon mustard, garlic powder, smoked paprika, bouillon powder if using, pepper, and salt. Fold in the drained cavatappi until every piece is coated.
07 -
Spread half the pasta in a greased 9x13-inch baking dish. Sprinkle with half of the reserved shredded cheese, add the remaining pasta, then top with the last cheese.
08 -
Bake for 20-25 minutes until bubbling with browned spots on top. Broil for 1-2 minutes if needed, watching closely. Rest for 10 minutes before serving.