||Melt chocolate over hot water. Set aside.
||Mix together the melted chocolate, oil and sugar.
||Add unbeaten eggs, one at a time, beating after each addition.
||Sift flour, baking powder and salt together. Add this gradually to the chocolate mixture. Add vanilla.
||Cover bowl and put into refrigerator for 24 hours.
||Use a teaspoon to scoop dough into the size of a small walnut. Roll in hand to form a ball; then flatten with the palm of the hand; dredge thoroughly in powdered sugar and place on ungreased cookie sheet.
||Bake at 350° for about 6 minutes. Cookies puff up a bit and then flatten out when cool. Let them cool a minute before removing from cookie sheet.