Sour Cream Sugar Cookies Recipe

1 cup Butter
1 cup Sugar
3 Egg Yolks
1/2 cup Sour Cream
1 tsp Vanilla
3 cups Flour
1/2 tsp Soda
1/2 tsp Salt
Glaze
3 Tbsp Margarine-melted
2 cups Powdered Sugar
1 tsp Vanilla
2 to 3 Tbsp Milk
Mix. Roll out and cut. Bake at 350° for 10 to 12 minutes. Dip top
of cookies in glaze. Let dry.