In the bowl of your stand mixer, cream together sugar, butter and oil. Mix over medium speed until smooth. Add vanilla and then the eggs, one at a time.
In another bowl, combine flour, cocoa, baking soda, baking powder and salt.
Add dry ingredients to the mixer about 1 cup at a time with the mixer on medium speed until well incorporated.
Place cookie dough in the fridge for 1 hour.
Once the dough is chilled, preheat oven to 350 degrees.
Line a cookie sheet with parchment paper.
Roll 2-3 tablespoons of dough to form a ball and then roll each ball in granulated sugar. Transfer to cookie sheet and repeat until your cookie sheet is full. Space the cookies about 2" apart.
Bake for 10 -11 minutes.
Transfer cookies to a cooling rack to let cool.