Beat together your butter and sugar until light and fluffy!
Add in the egg, and vanilla, and beat again until smooth.
Adding the flour, bicarbonate, salt and cornflour and beat until a cookie dough is formed!
Add in the chocolate chips, mix, and press into the bottom of a 9x9" square baking tin, lined with parchment paper.
Freeze for 20 minutes!
For the Oreo Layer
Preheat your oven to 180C/160C fan
Cover the layer of cookie, with Oreos. I keep mine whole, and just cover them!
For the Brownie Layer
Melt together your dark chocolate with your butter until smooth.
Whisk together the eggs and sugar into a thick mousse like mixture, and then fold through the melted chocolate mix.
Add in the flour, and cocoa powder, and fold through again.
Mix through the chocolate chips carefully, and then pour over the Oreo layer!
Bake the slutty brownies in the over for 25-30 minutes, or until baked through. Sometimes can take a smidge longer!
Leave to cool in your tin for 10 minutes, and then carefully remove and finish cooling on a wire rack.
Cut up into your portions and enjoy!
Notes
I think it's important to freeze the cookie dough, to help the brownies bake better. It is optional however! If you want, you can put the cookie layer into the fridge for an hour instead of the freezer for 20 minutes!
The Oreos are optional, if you just want to make brookies then you can leave them out!
The cookie layer is inspired by my cookie bars, and the brownie layer is inspired by my brownies! The general idea, is inspired my Rosie Londoner!
These will last for 4-5 days easily, if not longer if they aren't already eaten!