1 c. sweet butter
1 egg
1 c. sugar
1 tsp. vanilla
2 c. flour
1/2 tsp. baking soda
1/2 tsp. cream of tartar

Cream butter and sugar together. Add egg. Mix dry ingredients, sifted once. Add a little at a time. Add vanilla. Roll into small balls about the size of a walnut. Flatten with a fork. Bake at 350 to 375 degrees for 10-12 minutes.