- 1/2 cup butter room temp
- 1 cup Marshmallow Fluff
- 2 cups powdered sugar
- 2 Tbsp milk
- Mix butter and Fluff until smooth on medium speed until smooth.
- Slowly add in powdered sugar with mixer on low.
- Add in milk and turn speed up to medium and mix until all combined and smooth.
- Color frosting if desired.
- Spread over cooled blondies