100²µ/3Β½΄Η³ϊ golden syrup
125²µ/4Β½΄Η³ϊ caster sugar
100²µ/3Β½΄Η³ϊ cocoa powder
350g/12oz self-raising flour
350g/12oz butter, softened, plus extra for greasing
6 free-range eggs, lightly beaten