Given the task definition and input, reply with output. In this task, you have to identify the named entities (NER) which are the ingredients required given its directions. Named entities are the names of the items without their quantity.

Place the cream and butter in a saucepan and heat over medium heat., Once all the butter is melted, add the Parmesan cheese., Stir the cheese., in with a whisk until it is well incorporated., Bring to a simmer and cook over medium-low heat for 5 minutes., Add in the vinegar, salt, pepper, and nutmeg (if desired)., Stir well., Taste, and add more salt and pepper if desired.
heavy cream, butter, parmesan cheese, white wine vinegar, salt, pepper, nutmeg