Preheat the oven to 350 degrees Fahrenheit.
Using a KitchenAid stand mixer fitted with a paddle attachment begin to cream the butter, brown sugar and a ½ cup of the granulated sugar together. Mix together on medium speed for 2 minutes until creamy.
2 sticks Unsalted Butter, 1 cup Brown Sugar, 1 cup Granulated Sugar
Then add the eggs one at a time while the mixer is on low speed. Pour in the vanilla extract. Mix again for 1 minute then stop and scrape down the sides of the bowl.
2 Eggs, 2 teaspoons Vanilla Extract
Pour the all-purpose flour, cocoa powder, salt, baking soda, and baking powder into the bowl. Mix for one minute starting on low speed and gradually increasing to medium.
2 cups All-Purpose Flour, ⅔ cup Dutch Process Cocoa Powder, ⅛ teaspoon Salt, 1 teaspoon Baking Soda, ½ teaspoon Baking Powder
Line baking sheets with parchment paper and set to the side.
Place the remaining ½ cup granulated sugar into a bowl. Using a medium cookie scoop, scoop chocolate dough one-by-one and drop into the bowl with the sugar. Sprinkle sugar on top, roll the ball of dough around until it is covered in granulated sugar then place on an un-greased parchment lined baking sheet. Repeat until all the cookie dough is used.
Bake in the middle rack for 12 minutes until the cookies are just set. Remove from the oven and let rest on the baking sheet for 10-15 minutes until cooled and set. Enjoy immediately or package in an air tight container for up to 5 days.