Preheat your oven to 350°F (175°C).
In a large bowl, mix the melted butter with brown sugar and granulated sugar until smooth.
Add the eggs and vanilla extract, mixing until well combined.
In another bowl, whisk together flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, stirring until just combined.
Fold in the chocolate chips until evenly distributed.
Using a cookie scoop, drop dough onto a baking sheet lined with parchment paper.
Bake for 12-15 minutes, until the edges are set but the centers are still soft.
Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack.