Melt the butter and chocolate

• Melt the butter with the semi-sweet chocolate chips in a saucepan over low heat, stirring until smooth.
• Remove from the heat and let cool slightly.

Whisk the sugars and eggs

• Whisk the white sugar and brown sugar into the chocolate mixture.
• Add the eggs one at a time, whisking well after each addition.
• Stir in the vanilla extract and salt until the batter is glossy.

Fold in the dry ingredients

• Sift the all-purpose flour and cocoa powder over the batter.
• Fold gently with a spatula until just combined, without overmixing.

Add the crushed Oreos

• Gently fold most of the crushed Oreos into the batter, keeping some for the top.
• Scatter the remaining Oreos over the surface.

Bake the brownies

• Preheat the oven to 180 °C and line a baking dish with parchment paper.
• Pour in the batter and spread it evenly.
• Bake until the edges are set and a toothpick comes out with a few moist crumbs.

Cool and cut

• Let the brownies cool completely in the dish.
• Cut into squares and serve.