1/3 c. butter, softened
1 tsp. vanilla
1/4 tsp. salt
2 unbeaten egg whites
1 lb. powdered sugar
Milk

Cream butter with vanilla and salt until fluffy. Add egg whites and sugar alternately, a little at a time, beating well after each addition. Add 1 tablespoons milk and beat. If necessary, add more milk to make of desired spreading consistency.