Pour in the heavy cream and increase the heat slightly to let it bubble gently.
Gradually sprinkle in the grated Parmesan cheese, stirring continuously until it thickens and is well combined.
Add a pinch of salt and optional black pepper or Italian seasoning. Stir well.
Taste the sauce. If it needs more tang, add a spoonful of cream cheese.
Keep stirring until the sauce coats the back of a spoon and is smooth.
Notes
Expect your kitchen to smell amazing! Serve with pizza, fries, or vegetables. The sauce can be stored in a tight container in the refrigerator for up to 5 days. Thin it out with milk if it thickens too much during storage.