Marshmallow Icing

Directions

1. 1
   Beat the butter in the bowl of a standing mixer fitted with a paddle attachment on high speed until it is light and smooth, about 3 minutes.
2. 2
   Add the confectioners sugar and mix on low speed until incorporated, about 2 minutes.
3. 3
   Add the Marshmallow Fluff and mix on medium-high speed until smooth, about 2 minutes.
4. 4
   Use the icing immediately, or keep it in an airtight container at room temperature for up to 3 days.
5. 5
   Before using, beat the icing in a mixer, or stir vigorously with a rubber spatula, for about 2 minutes.