Preheat the oven to 350° F/177° C. Place parchment paper on a baking sheet. Set aside.
In a large bowl, whisk together sugar, oil, milk, and vanilla until smooth.
Next, add in your flour, cocoa powder, baking powder, baking soda, and salt. Stir with a spatula until it's completely combined.
Add powdered sugar to a smaller bowl.
Scoop out tablespoon size balls of dough. Roll each ball very thoroughly into the powdered sugar.
Place on parchment lined baking sheet about 2 inches apart as they will spread while cooking. *DO NOT PRESS DOWN.
Bake for 10 to 13 minutes. It's okay if still slightly soft in the center.
Allow to cool on the baking sheet for 5 minutes. The transfer to a cooling rack.