Butterscotch Icing

Directions

1. 1
   Combine the shortening, salt and xxx sugar into a large bowl, adding the sugar gradually and creaming well.
2. 2
   Put aside.
3. 3
   Combine brown sugar, butter, 1/4 cup milk and corn syrup in a saucepan and cook until a small amount forms a hard ball in cold water (250°), stirring constantly after the mixture starts to boil.
4. 4
   Quickly heat 3 tablespoons milk and add to the first mixture, then gradually pour in the cooked mixture.
5. 5
   Beat until thick and smooth enough to spread on 2 (8-inch) cakes or 1 (10-inch) loaf cake. Frost quickly as this thickens rapidly.
6. 6
   A hot spreader helps.