- 1/2 cup butter, softened
- 7/8 cup heavy cream, chilled
- 1 1/4 cups confectioners' sugar
- Place all of the ingredients in the bowl of a food processor fitted with a metal blade, and process for 5 minutes. Stop once in a while and wipe down the sides.
- Transfer to a bowl of a stand-up mixer fitted with a paddle attachment. Mix on medium-high until white and fluffy, at least 15 minutes. Use straight away.