In a smaller saucepan, place the butter, cream cheese and heavy cream over medium heat. Let it heat, stirring occasionally, until the butter and cream cheese have both melted and incorporated. Then stir in the garlic and seasonings. Let this mixture come up to a simmer, then allow it to simmer until it has thickened, about 5 minutes or so. Once thickened, remove it from the heat and immediately stir in the parmesan cheese until it's melted smoothly into the sauce.