In a standing mixer bowl with the paddle attachment, add the 1/2 cup of room temperature butter with 1 cup of granulated sugar and 1 cup of brown sugar. Mix until combined.
Add the 1 cup of cocoa powder and mix until combined again.
Fold in 4 eggs and 2 teaspoons of vanilla.
In a separate bowl combine 2 cups all-purpose flour, 1 tsp of baking soda, 1 tsp of baking powder and 1/2 tsp of fine sea salt.
Turn the mixer on low and slowly pour in the dry ingredients.
As soon as a dough forms, turn the mixer off and scoop the dough onto a large sheet of plastic wrap. Wrap the dough up and place in the fridge for 1-3 hours to chill.
When ready to bake, preheat your oven to 350 degrees.
Prepare light metal cookie sheets with parchment paper.
Scoop the dough with a large cookie scoop onto the prepared cookie sheets.
Roll all the cookie dough balls in the 1 cup of powdered sugar.
Bake in the preheated oven for 10-12 minutes until the cookies are set and a little dully on top.
Remove and allow the cookies to rest on the pans for 5-10 minutes before removing and allowing to fully cool.