Thumbprint Cookies - cooking recipe

Ingredients

1 c. butter or margarine
1 1/2 c. confectioners sugar
1 egg
1 tsp. vanilla
1 tsp. cream of tartar
1/4 tsp. salt
2 1/2 c. flour
1 egg white
1 tsp. baking soda
chopped walnuts

Preparation

Cream butter and sugar until fluffy.
Add whole egg and vanilla; beat well.
Sift flour, baking soda, salt and cream of tartar; gradually add to mixture.
Chill dough for 1 hour.