01 -
Beat butter in bowl of stand mixer with whisk attachment on medium-high speed until light and fluffy, about 3 minutes.
02 -
Add vanilla extract.
03 -
With mixer on low, slowly add in confectioners' sugar, milk, and salt; frequently scrape sides and bottom of bowl.
04 -
Once incorporated, whip frosting for at least 3 minutes on medium high to high. (Can go up to 7 minutes).
05 -
If frosting is too thick to spread, gradually beat in additional milk.
06 -
Store in refrigerator up to 2 weeks. Rewhip before using.