Preheat your oven to 350°F (175°C).
Grease a 9x13 inch baking pan.
In a large bowl, combine melted butter and sugar.
Stir in the eggs and vanilla extract until smooth.
In a separate bowl, whisk together flour, cocoa powder, and salt.
Gradually add dry ingredients to the wet mixture, stirring until combined.
Fold in crushed Oreos and chocolate chips.
Pour the batter into the prepared baking pan, spreading evenly.
Bake for 30 minutes or until a toothpick comes out with a few moist crumbs.
Let cool before slicing and topping with extra Oreos.