Yummy Chocolate Crinkles

In a bowl, mix together the cocoa powder, sugar, and oil. Beat in eggs one at a time, along with the vanilla. In another bowl, combine the flour, baking powder, and salt; stir into the cocoa mixture, cover and chill for 3 hours. Preheat oven to 180C and grease or line a baking tray. Remove dough from the fridge and roll into balls. Roll each ball in confectioners' sugar and placing onto prepared cookie sheets. Bake in the preheated oven for 10 to 12 minutes. Allow to stand cool on the tray for a minute or two before transferring to wire racks to cool completely.