Answer:
Stay away from long, thin pasta like spaghetti and linguine, and shapes that are super tiny. Follow this tip: Select a pasta with plenty of surface area and nooks and crannies to capture as much of that blissful cheese sauce as possible. I especially love shells, campanelle, and the ever-classic elbow macaroni.
Explanation: I use corkscrew pasta in this recipe, it's sometimes called cavatappi or cellentani. These noodles are heartier than standard elbow macaroni and don't get mushy as they bake. If you want to use elbow macaroni or a different type of short pasta, that will also work just fine.