This is the easiest frosting you will ever make and without a doubt, one of the tastiest. Frost all of your desserts with it! You're going to be obsessed.
- In a large bowl, beat butter until smooth.
- Gradually add in powdered sugar, 1/2 cup at a time, until fully incorporated and smooth.
- Beat in vanilla extract.
- Carefully fold in marshmallow fluff until combined.
- Scoop into a piping back or a ziplock back with a corner cut off and use it to frost your favorite cupcakes, cakes, or even cookies! Serve and enjoy!