In a large bowl, beat butter until light and fluffy (I typically use hand beaters, but a stand mixer will work as well). Gradually add powdered sugar, beating well. Beat in vanilla and milk until you have your desired consistency.
This frosting makes enough to cover a typical cake mix.
Licking of beaters is encouraged and expected.
Recipe by Food Fun Family at https://foodfunfamily.com/how-to-make-the-perfect-birthday-cake/