In the bowl of a stand mixer fitted with the paddle attachment, beat cream cheese at medium speed until smooth, about 1 minute. In another large bowl, whisk together confectioners’ sugar and nutmeg. Gradually add sugar mixture to cream cheese, beating until smooth, stopping to scrape bottom and sides of bowl.
Gradually add heavy cream, beating until thickened and smooth. Beat in vanilla. Use immediately.
Recipe by Bake from Scratch at https://bakefromscratch.com/eggnog-bourbon-cake/