Preheat the oven to 200C/180C Fan/Gas 6. Line an 8 inch square tin.
Melt the dark chocolate in the microwave in 20 second intervals. Set aside.
In a large bowl/the bowl of a stand mixer, combine the melted butter and both sugars. Add the eggs and mix again. Slowly incorporate the melted chocolate until everything is fully combined.
Fold in the flour, cocoa powder and chopped chocolate until just combined.
Pour the batter into the tin and bake for 30 minutes. Let cool on a wire rack.
Loosen up the caramel by heating in a microwave proof dish for about 30 seconds. Drizzle over the brownies using a spoon. Let set a little before slicing and serving! (If serving warm, add ice cream and drizzle the caramel afterwards!).