Preheat your oven to 350°F (175°C) and line a 9x13-inch pan with parchment paper.
In a large bowl, whisk melted butter with both sugars until well combined.
Add eggs and vanilla. Mix until smooth.
Stir in flour, baking soda, salt, and cocoa powder until just combined.
Fold in chocolate chips. The dough will be thick and sticky—worth it.
Spread the dough into the pan. Top with extra chocolate chunks if you’re feeling bold.
Bake for 28–32 minutes until the top is golden and a toothpick comes out with just a few moist crumbs.
Cool before cutting… or don’t. No judgment here.