3/4 c. butter
3/4 c. sugar
1 egg
1 tsp. vanilla
2 c. plain flour
1 tsp. baking soda
1 tsp. cream of tartar
1/4 tsp. salt
1 (12 oz.) semi-sweet chocolate chips
1 - 2 tsp. vegetable shortening

Cream butter and sugar. Add egg and vanilla. Add dry ingredients gradually. Roll out 1/8-inch thick. Cut out.

Bake at 350°F for 11 minutes. Melt chocolate chips and vegetable shortening. Dip cookies & let cool on wax paper.