Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a large mixing bowl, combine cocoa powder, granulated sugar, and oil. Whisk until smooth, about 2 to 3 minutes.

Crack in the eggs and add vanilla extract. Mix until just incorporated.

Gradually add baking powder, salt, and flour. Stir until a stiff dough forms.

Using a cookie scoop, portion out 1.5-inch balls of dough. Roll between palms to smooth.

Roll each dough ball in granulated sugar, then in powdered sugar for a crackled appearance.

Place the coated balls on the baking sheet, leaving about 2 inches between them.

Bake for 10 minutes, until crinkled on top and slightly underbaked in the center.

Let cool on the sheet for 5 to 10 minutes before transferring to a wire rack to cool completely.