Preheat your oven to 180C/160C Fan and line a 9″ square baking tray with parchment paper.
Melt together the unsalted butter and dark chocolate in a heatproof bowl over a pan of boiling water, on the microwave for 1-2 minutes until melted. Leave to the side to cool to room temperature!
In a new bowl, add the eggs, sugar and discard.
Mix these together until thoroughly combined
Pour the cooled chocolate mix over eggs and fold together carefully.
Add the cocoa powder and plain flour on top of the chocolate mix and then fold together again
Fold through the chocolate chips and pour into the prepared tin – bake in the oven for 25-30 minutes
Once baked, leave to cool fully in the tin and then set in the fridge for a minimum of two hours
Notes
These brownies will last for a week, at room temperature or in the fridge