1/2 c. butter
1/2 c. butter
1/2 c. sugar
1/2 c. powdered sugar
1/2 tsp. baking soda
1/2 tsp. cream of tartar
1/2 tsp. salt
1 1/2 tsp. vanilla
1 beaten egg
2 1/2 c. flour
Chocolate chips

Cream butter, butter, sugar, powdered sugar until creamy. Add soda, cream of tartar, salt, and vanilla; add beaten egg and flour. Shape dough into balls (size of small walnut). Dip glass into additional sugar, press on cookie. Bake 10 minutes at 375 degrees. Yield: 4 dozen cookies.