2 c. powdered sugar
1/2 c. shortening
1 egg white
1/2 tsp. salt
2 tbsp. cake flour
2 tbsp. milk
1/2 tsp. vanilla

Mix together and beat 10-15 minutes on high speed with electric mixer. Can substitute 1 tablespoon cornstarch with 1 tablespoon flour for cake flour. Can easily double recipe and will generously frost double layer cake. Also delicious between graham crackers as snack for children.