1/2 c. shortening
1/2 c. butter
1 tsp. vanilla
4 c. sifted powdered sugar
2 tbsp. milk
3 tbsp. light corn syrup

Cream butter and shortening together on medium speed until light and fluffy. Beat in vanilla. Gradually add sugar, beating well and scraping down sides of bowl often. Add milk and corn syrup and beat until light and fluffy.