Preheat your oven to 350°F (175°C) and line an 8x8 baking pan with parchment paper to prevent sticking, this little step ensures you’ll have perfect brownies and an easy cleanup.

In a medium saucepan, melt together the dark chocolate and butter over medium heat, stirring occasionally until the mixture is smooth.

Once the majority of the chocolate has melted, remove the pan from the heat and stir until the mixture is fully melted and velvety smooth.

Allow it to cool for a few minutes while you prep the dry ingredients.

Once the chocolate mixture has slightly cooled, whisk in the granulated and brown sugars, stirring until the mixture is completely smooth and well blended. This will give your brownies that wonderful sweet base and help achieve the rich, fudgy texture we all love.

In another bowl, whisk together the flour, cocoa powder, cornstarch, and sea salt  Whisk until the mixture is lump-free and smooth, then set it aside. This dry mix will balance out the rich chocolate, creating that perfect brownie texture.

Next, add the eggs one at a time into the cooled chocolate mixture, then stir in the vanilla extract. Whisk this together for about 3 minutes. It should thicken up and turn glossy, this is when the magic starts to happen!

Next, gently fold in the dry ingredients into the chocolate mixture. Stir just until it’s all combined, don’t overmix, or the brownies could turn out cakier rather than that dense, fudgy texture we’re going for.

Carefully fold ¾ of the crushed Oreos into the batter, making sure they’re evenly distributed. The rest of the Oreos are going on top to give a crunchy finish when baked.

Transfer the batter into your prepared pan and smooth it out evenly. Sprinkle the remaining crushed Oreos on top for an extra cookie crunch. 

Bake for 25 to 30 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs, signaling the perfect fudgy texture.

Once baked, let the brownies rest in the pan for 5 to 10 minutes before removing them. Then, transfer them to a wire rack and allow them to cool completely before serving. Enjoy!