Created by KittenCal on October 31, 2011
Step 1: In a mixing bowl using an electric mixer at medium speed beat the butter with cream cheese, vanilla and whipping cream until fluffy and smooth (about 3 minutes).
Step 2: Add in sifted confectioners sugar; beating on lowest speed until combined and smooth adding in more cream or sugar if needed to achieve the desired consistancy).
Step 3: Mix in the Cool Whip on low speed, if using.