Preheat your oven to 350°F (175°C).
In a large mixing bowl, cream together the softened butter, granulated sugar, and brown sugar until smooth.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract until fully combined.
In a separate bowl, whisk together the flour, cocoa powder, baking soda, and salt.
Gradually add the dry ingredients to the wet mixture, mixing until just combined.
Fold in the chocolate chips until evenly distributed.
Drop rounded tablespoons of dough onto a lined baking sheet.
Bake in the preheated oven for 10-12 minutes, or until the edges are set.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack.