Preheat your oven to 350°F (175°C).
In a large bowl, combine the melted butter and granulated sugar until well mixed.
Add the eggs one at a time, mixing well after each addition, then stir in the vanilla extract.
Sift together the flour, cocoa powder, and salt in a separate bowl before adding to the wet ingredients.
Gradually mix the dry ingredients into the wet mixture until just combined; fold in chocolate chips.
Spread the batter into a greased baking dish, approximately 9x9 inches, ensuring even distribution.
Bake for 25-30 minutes, or until the edges are set and a toothpick inserted into the center comes out with a few moist crumbs.
Remove from the oven and allow to cool for about 10 minutes before cutting into strips.
Dust with powdered sugar before serving to add a touch of sweetness and elegance.