For best results, use freshly grated Parmesan cheese rather than pre-shredded, which often contains anti-caking agents that can make the sauce grainy.
If the sauce becomes too thick, add a splash of hot pasta water to thin it to your desired consistency.
Alfredo sauce does not reheat well as it tends to separate. It is best served immediately after preparation.
Optional additions: Add a pinch of nutmeg or black pepper for extra flavor depth. You can also add cooked chicken or shrimp for a main course.