Beat the cream cheese and butter in a large bowl with a mixer on medium-high speed until creamy, about 2 minutes. Reduce the mixer speed to low; beat in half the confectioners' sugar until combined. Beat in the remaining confectioners' sugar, the salt and vanilla.
Increase the speed to medium high and beat until smooth and fluffy, about 3 minutes.
Chocolate Cream Cheese Frosting: Make Cream Cheese Frosting, whisking 3/4 cup unsweetened cocoa powder with the confectioners? sugar before beating it in.