Preheat oven to 350°F and line a baking sheet with parchment paper.
Mix cocoa powder, granulated sugar, and oil until smooth.
Add eggs and vanilla, then mix again.
Stir in remaining dry ingredients to form a stiff dough.
Portion dough into equal-sized balls using a cookie scoop.
Coat each ball in granulated sugar, then roll in powdered sugar for that classic crinkle look.
Bake for about 10-12 minutes until the tops have cracked.
Cool slightly on the baking sheet, then transfer to a wire rack to cool completely.
