Preheat your oven to 350°F (175°C). Line an 8×8 inch baking dish with parchment paper.

In a saucepan over low heat, melt the butter. Remove from heat and stir in granulated and brown sugars until combined.

Let cool slightly before whisking in the eggs one at a time, followed by the vanilla extract.

In a separate bowl, mix flour, cocoa powder, and a pinch of salt. Gradually fold into the wet mixture until no flour streaks remain.

Gently incorporate chocolate chips into the batter.

Pour the mixture into the prepared baking dish and bake for 20-25 minutes or until a toothpick comes out with moist crumbs.