Mix oil, chocolate and granulated sugar. Blend in one egg at a time until well mixed. Add vanilla. Mix in flour, baking powder, and salt. Chill several hours or overnight.
Heat oven to 350 degrees. Drop teaspoonfuls of dough into the powdered sugar. Roll in sugar; shape into balls. Place about 2 inches apart on a greased baking sheet, or one lined with a silpat. Bake 10 to 12 minutes. Do not overbake!!!!