1 pound Parmesan cheese Finely grated for emulsion.
1 pound Dry fettuccine pasta To be cooked past al dente.
1 pound Butter High butter fat, for emulsification.
as needed Pasta water Reserved for sauce adjustment.
1 Eggs Base for mayonnaise.
1 Dijon mustard Flavor enhancer.
1 Lemon juice For acidity, can substitute vinegar.
as needed Black pepper Seasoning.
as needed Oil (grapeseed, canola, rice bran) Neutral oil for mayonnaise.
a touch Sugar Enhances flavor.