1/2 (8-oz.) package cream cheese, softened
1/4 cup butter, softened
1 (7-oz.) jar marshmallow crème
2 teaspoons vanilla extract
2 1/2 cups powdered sugar
Beat cream cheese, butter, marshmallow crème, and vanilla at medium speed with an electric mixer until creamy. Gradually add powdered sugar, beating at low speed until blended and smooth.