Melt the butter completely. Add cocoa, sugar, free range eggs and vanilla; and mix well until colour lightens slightly. Add sifted flour, baking powder, salt and grated chocolate, and mix until just combined, at this point you might wish to add a cup of Fair Trade raisins to the mixure. Pour into a 32cm x 23cm x 23cm x 5cm lined sponge roll tin and bake at 150 degrees C for approximately 50 minutes. The brownie will crack slightly around the edges but will be soft to the touch. Allow to cool and dust with Fair Trade cinnamon  cut into approximately 16 brownies. Serve with a steaming cup of Trade Aid coffee (or hot chocolate for those with a major sweet tooth!)