how to make butter icing white
Directions. (See below for addition of food coloring directions.). 1  In one bowl, thoroughly cream butter, shortening, and vanilla. 2  Add one cup of powdered sugar and one tablespoon of milk. 3  Beat thoroughly at medium speed. 4  Repeat step #2 until you have added all of the milk and powdered sugar.See below for addition of food coloring directions.). 1  In one bowl, thoroughly cream butter, shortening, and vanilla. 2  Add one cup of powdered sugar and one tablespoon of milk. 3  Repeat step #2 until you have added all of the milk and powdered sugar. 4  Beat for an additional 3-5 minutes at medium speed.