In the same skillet, heat to medium, add butter, let melt. Add the milk, heavy cream, cream cheese, and seasonings to deglaze the pan. May have to turn the heat down until it reduces. Once it reduces, and the cream cheese until it is melted, take the pan off the heat and add the parmesan cheese. If the sauce is too hot, the cheese will not be smooth. Taste. Add more pepper flakes, cayenne, bouillon, parmesan cheese, or pepper to taste.