Butter Cookie

1 cup of butter 

1 1/2 cups of sifted powdered sugar
1 egg 

1 teaspoon of vanilla 

2 1/2 cups of sifted flour
1 teaspoon of cream of tartar 

1 teaspoon of baking soda 

1/4 teaspoon of salt

method;
Cream butter, add sugar gradually and cream until fluffy.  

Add unbeaten egg and vanilla; beat well.  

Sift together dry ingredients; blend into cream mixture. 

Chill dough about an hour.  

Rol  on wel  floured pastry board to 1/4 inch thickness.  

Cut with floured cutter.  

Bake on an unbuttered cookie sheet for 6 minutes at 325 degrees.