Cream shortening in large mixing bowl using medium speed of an electric mixer; gradually add half of sugar. Cream until light and fluffy.
Add egg white (at room temperature), salt, and vanilla; mix well. Add remaining sugar and 1/2 cup whipping cream alternately, beginning and ending with sugar; add more whipping cream if necessary. Mix well after each addition. Continue beating until the mixture is fluffy and creamy.
Note: Frosting will keep in an airtight container in the refrigerator for several days.