1 c. shortening
1 c. sugar
2 egg yolks
3 tsp. vanilla extract
3 c. flour
1/2 tsp. salt
1 tsp. baking powder
6 tbsp. milk
2 (1 oz.) sqs. unsweetened chocolate, melted

Thoroughly cream shortening and sugar; add egg and vanilla. Add sifted dry ingredients alternating with milk. Divide dough in half; to one half. Add chocolate. Mix thoroughly. Roll each half in 1/8 inch thick on heavy waxed paper. Turn white part on chocolate with chocolate extending 1/2 inch beyond white part on edge toward which you roll. Remove paper and roll as for jelly roll. Wrap in waxed paper. Chill thoroughly overnight; slice thin. Bake on ungreased cookie sheet in moderate oven (375 degrees), about 9 minutes. Makes 8 dozen cookies.