Method

1. Grease a 20cm square or 10cm x 25cm rectangular cake tin. Line the base and sides with baking paper.
2. Place 200g chocolate in a medium-sized microwave-safe bowl. Microwave on high in 30 second bursts, stirring, until melted and smooth. Pour melted chocolate into the prepared tin and set aside to partially set.
3. Place remaining 400g chocolate and vegetable oil in a large microwave-safe bowl. Microwave on high in 30 second bursts, stirring, until melted and smooth.
4. Place remaining ingredients in a large bowl and mix to combine. Set aside 1 cup of the mix to decorate. Pour melted chocolate over the remaining mixture and stir until well combined. Spoon into the prepared tin, on top of the set chocolate, and smooth into an even layer. Scatter with reserved ingredients then chill for 2 hours or until set. Smash to serve.

NOTES Can always change up the cookie dough, use the triple choc or the brownie