1Place the butter in the bowl of a stand mixer fitted with a paddle attachment and mix on medium-high speed until fluffy and light in color, about 4 minutes. Stop the mixer and scrape down the sides of the bowl and the paddle with a rubber spatula.
2Add the powdered sugar and vanilla, return the mixer to low speed, and mix until incorporated, about 1 minute. Increase the speed to medium high and mix until the frosting is airy and thoroughly mixed, about 1 minute more. Refrigerate in an airtight container until ready to use.