Start by preheating your oven to 175C, then pop all the ingredients except the walnuts into a food processor and blend for a couple of minutes until a smooth and sticky batter forms.
Crumble the walnuts into the bowl and stir in, then spoon the batter into a lined baking tin or mould and press down with a spoon to make sure it's all nice and even.
Place in the oven and bake for 25 minutes, then leave for another half an hour to cool (as the brownies will continue to cook after they are taken out the oven).
Then, when the waiting is finally over, cut into squares and enjoy!
