In the bowl of a stand mixture. beat together the cocoa powder, sugar, and oil with the mixture on medium speed.
Beat in the eggs, one at a time. Add in the vanilla.
Sprinkle the baking powder and salt over the mixture and stir in. Then add in the flour and stir together until evenly combined.
Divide the dough in half. Place each half on a plate, flatten out to about 2" thickness, and put it in the freezer for about 45-60 minutes.
Preheat the oven to 350F and spray 2-3 cookie sheets generously with nonstick spray.
Spread 3/4 cup confectioner's sugar on a plate. Using spoons or a cookie scoop, roll the dough into 1" balls and roll them in the powdered sugar. Place them on the prepared cookie sheets spaced 2" apart.
Re-roll any of the early cookies that have cookie showing through- you want the cookies to be completely coated.
Bake the cookies 10-12 minutes, and allow to stand on the cookie sheets for another 3-4 minutes after coming out of the oven. Let cool on racks to cool.