2 sticks butter
2 c. flour
1 c. brown sugar
1/2 tsp. cream of tartar
1/2 tsp. baking soda
1 pinch salt
2 tsp. vanilla

Cream together butter and brown sugar. Add other ingredients, except vanilla; cream together. Add vanilla.

Drop on a cookie sheet. Press flat with fork dipped in milk. Bake 10 minutes at 350 degrees (or until brown).