Preheat oven to 350. Microwave butter for a couple seconds to soften it.
Blend butter, granulated sugar, and brown sugar with electric mixer until creamy.
Add egg and vanilla and mix until combined.
In a separate bowl, combine flour, cocoa, baking soda, and salt.
Add flour mixture to bowl and mix until combined. Mix in chocolate chips.
Scoop approximately 1 tbsp of dough and roll it into a ball.
Roll the ball of dough in the powdered sugar and flatten slightly on cookie sheet.
Aren't they pretty? No?
Bake for 8 minutes at 350. Let cookies cool on the cookie sheet for a couple minutes before transferring them to a wire rack.
Om nom nom