Best Buttercream frosting

I made cupcakes for a family function and wanted to pipe the frosting.  I found this recipe at http://www.all-about-cupcakes.com.  It's easy and yummy.

1 stick butter
3 cups confectioners sugar, sifted
2 tablespoons milk

1. Have butter and milk at room temperature.

2. Place butter in small bowl of electric mixer and beat until butter is as white as possible.

3. Gradually add about half the sifted icing sugar, beating constantly.  Add milk.

  4. Beat in the remaining icing sugar.

5. Mixture should be smooth and easy to spread with a spatula. Add extra milk or icing sugar until cupcake frosting is of a spreadable consistency.