Step 1

In the bowl of a stand mixer, whip the butter using the whisk attachment (the paddle works too). Beat until fluffy, about 5 minutes.

Step 2

With the mixer on low speed, gradually add in the confectioners' sugar until completely incorporated.

Step 3

With the mixer on medium speed, add the vanilla and salt, and beat for a minute, until fluffy. Add milk until desired consistency is reached.

Step 4

Transfer to a frosting bag with tip and frost away!