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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.
1 Dash salt. 2  Note: Do NOT pour in the milk. 3  Trust me. 4  Do this as instructed, or you will have to keep adding sugar until you get a good consistency, and then you will end up with enough icing to cover surplus amout of cakes! ( If you are icing everything in your home, then go right ahead).