Preheat your oven to 350°F (175°C) and line a 9x9-inch baking pan with parchment paper.

Melt butter and mix with granulated sugar until creamy. Add eggs and vanilla extract, mixing well.

In another bowl, whisk flour, salt, and crushed Oreo cookies. Fold dry mixture into wet ingredients, then add chocolate chips.

Pour the brownie batter into the prepared pan and press whole Oreo cookies into the surface.

Bake for 30-32 minutes. Check for doneness with a toothpick; it should come out with a few moist crumbs.

Remove from oven and let cool for 10-15 minutes before lifting out and cooling completely on a wire rack.