Oreo cookies and brownie...a very tasty combination!
Preheat the oven to 350F. Grease a 9 x 9 inch square baking tin with butter, then line with baking paper with the paper overlapping the sides a little
In the top of a double boiler, melt the butter and chopped chocolate.
Whisk the eggs, egg yolks and vanilla together in a large bowl until the eggs begin to get light and fluffy.
Add the sugar in two additions, whisking between each.
Keep whisking until the mixture becomes stiffer. Once the egg mixture is ready, pour the chocolate into it.
Add the flour, cocoa powder, salt and a third of the biscuits and stir until fully combined, then pour the mixture into the prepared tin.
Scatter the remaining biscuits over the top, pressing them in slightly
Bake on the middle shelf of the oven for 25–30 minutes. The middle should be very so slightly gooey. Leave the brownies to cool in the tin – the top will sink and crack a little
Pull the brownies out using the overlapping paper and cut into squares. Dust with icing sugar