Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
In a large mixing bowl, whisk together the melted butter and white sugar until well combined.
Add the vanilla extract and eggs, one at a time, beating well after each addition.
Sift in the cocoa powder, all-purpose flour, baking soda, and salt. Stir until just combined, then fold in the chocolate chips.
Drop tablespoon-sized mounds of dough onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 8-10 minutes, or until the edges are set but the centers are still soft. They’ll continue to firm up as they cool.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely.