Melt the chocolate gently

Put the butter and sugar into the bowl beat until fluffy, gradually beat in the eggs, beat in the vanilla essence

Add the melted chocolate and mix thoroughly

Sift the flour and cocoa onto the mixture and gently stir in

Pour the mixture into a (greased and baselined) tin and spread evenly

Bake in the oven (180*C/gas 4) for about 20 minutes until firm to the touch but still a bit fudgey

Leave to cool before cutting eat within 4 days