Four Cheese pasta has basically 1 rule... and that is to use 4 cheeses. You can use fontina, gorgonzola, gruyere and parmesan like I did, or use cheddar, american, swiss, and blue cheese. No matter what the purists say, it’s STILL Quattro Formaggi pasta. I also tried this recipe starting with a bechamel instead of just starting with milk, and I preferred it with just the milk.