The homemade Alfredo is a must to achieve a quality dish. Some sauce tips: Always use real Parmesan cheese and grate it yourself. Canned Parmesan will result in a grainy texture in your sauce. Bring the Parmesan to room temperature by letting it sit on the counter for 15 to 20 minutes once it is shredded. Cheese that is at room temperature will melt and blend evenly, helping you attain a creamy and smooth texture to your sauce. Slowly whisk the Parmesan into the hot cream and butter mixture. Stir until it is melted and combined.