Yield: about 8 cups, enough for at least 6 dozen cupcakes
* 1 pound unsalted butter, at room temperature
* 3 pounds confectioners' sugar (3 boxes)
* 1/4 cup whole milk, at room temperature
* 1 tablespoon vanilla extract
* Food coloring, such as yellow, blue, and red, or your favorite
In the bowl of a large electric mixer, using the paddle attachment,
whip the butter on high speed until very soft. Meanwhile, place a
large sheet of parchment paper on a work surface. Using a large
sifter, sift a pound of confectioners' sugar onto the parchment. This
helps prevent clumping, and makes the mixing easier. Lower the speed
of the mixer, and, using the parchment as a funnel, pour the sugar
into the bowl and mix slowly until combined. Add the milk and mix
until combined. Sift the second pound of sugar onto the parchment
sheet. Again at low speed, add the sugar and mix well. Once combined,
sift the remaining sugar and add it with the vanilla and mix. Once it
is combined, turn the mixer speed up and beat the icing until very
light and fluffy, about 3 to 4 minutes.
If desired, divide the icing into smaller batches and color with food coloring.
Spread the icing on cooled cupcakes while at room temperature.
Refrigerate any leftover icing, but be sure to let it come back to
room temperature before using. Re-whip the icing to make it fluffy