1. In a large bowl, mix the cocoa powder, granulated sugar, and vegetable oil until glossy and combined.

2. Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.

3. In a separate bowl, whisk together the flour, baking powder, and salt.

4. Gradually stir the dry ingredients into the chocolate mixture until a thick sticky dough forms.

5. Cover the bowl and chill the dough for at least 2 hours.

6. Preheat the oven to 350°F and line baking sheets with parchment paper.

7. Scoop the chilled dough into tablespoon-sized portions and roll into balls.

8. Roll each dough ball generously in powdered sugar until fully coated.

9. Place the coated dough balls on the prepared baking sheets, leaving space between each one.

10. Bake for 10 to 12 minutes, until the tops are cracked and the centers are still slightly soft.

11. Let the cookies cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.