Preheat the oven: Preheat oven to 375° F (190° C). Line two baking sheets with parchment paper and set aside.
Melt butter and chocolate: In a microwave safe bowl, melt butter and chocolate chips at 50% power for 1 minute 30 seconds. Stir until smooth and set aside.
Dry ingredients: In a medium sized mixing bowl, whisk flour, cocoa powder, salt, and baking powder.
Wet ingredients: In a large mixing bowl, whisk brown sugar, chocolate butter mixture, eggs, and vanilla until well combined.
Combine Ingredients: Fold dry ingredients into the wet ingredients until a dough forms.
Sugar coating: Pour granulated sugar in a shallow bowl and pour powdered sugar in a separate shallow bowl.Portion about 1 ½ - 2 tablespoons of dough into balls and coat dough balls in granulated sugar, then coat in powdered sugar. Make sure to get a good coating in the powdered sugar.
Bake: Place dough on prepared baking sheet and bake for 6-8 minutes. Cookies will be done with cracks on top of cookies form.
Cool: Allow cookies to cool on baking sheet for 5 minutes then transfer to wire cooling rack to cool completely.