Suppose you can't find this specifically shaped pasta that we used in this recipe. In that case, it's totally fine to use elbow-shaped pasta instead. It's what the classic macaroni and cheese are made out of anyway. You can also use the cheeses you have available in your kitchen and leave out the rest. Although it would be a good idea to include gouda or cheddar because these are the cheeses that make for the best consistency of the pasta.