In mixing bowl combine cocoa and white sugar
Mix in vegetable oil
Add eggs one at a time and mix completely
Add vanilla
Now add the flour, baking powder and salt, incorporate
Cover and refrigerate dough for 2-3 hours or as long as you can wait
Roll dough by approximately Tablespoon size balls, coat each ball in powered sugar
Place on a cookie sheet
Bake in a 350 degree pre-heated oven for 8-10 minutes