Vanilla Frosting

1 Cup margarine
2 Teaspoons vanilla
4 1/2 Cups sifted powdered sugar
3 to 4 Tablespoons milk
1. Beat margarine and vanilla with an electric mixer on medium speed for 30 seconds.
2. Slowly add half of the powdered sugar, beating well.
3. Add 2 tablespoons milk.
4. Gradually beat in remaining powdered sugar and enough remaining milk to make of spreading consistency.