2 3/4 c. flour
2 tsp. cream of tartar
1 tsp. baking soda
1/2 tsp. salt
3/4 c. cocoa
1 1/4 c. soft butter
2 c. sugar
2 tsp. vanilla
2 eggs

Sift first 5 ingredients. Cream butter. Add sugar and vanilla. Add eggs, one at a time, mixing until light and fluffy. Add dry ingredients. Mix well. Roll dough into balls and roll in sugar. Put on an ungreased cookie sheet and bake at 350°F for 8 to 10 minutes.