This section is from the book "Betty Crocker's Cookbook For Boys and Girls", by Betty Crocker. Also available from Amazon: Betty Crocker's Cookbook for Boys and Girls.
Blend together
1/3 cup soft butter 1 cup sifted confectioners' sugar 1 1/2 teaspoons vanilla 3 tablespoons top milk
Then stir in
2 cups more sifted confectioners' sugar
Beat hard to make the icing fluffy.
Add a little more milk or sugar if you need it to make the icing just right to spread.
 
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