Gather the ingredients.
Cream butter in the bowl of a stand mixer fitted with the paddle attachment until smooth and fluffy.
Gradually beat in confectioners' sugar until fully incorporated.
Beat in vanilla extract.
Add milk and beat for an additional 3 to 4 minutes, adding more confectioners sugar for a stiffer frosting, if desired.
Add food coloring, if using, and beat for 30 seconds until smooth or until desired color is reached.
Use to frost your favorite cakes and cupcakes.
