1 x 1.5kg/3lb 4oz medium pineapple, peeled, cut into 7x8cm/2.5-3in diameter, 1cm thick cored rings, remainder reserved (about 175g/6oz)
175g/6oz golden syrup
275g/10oz caster sugar
275g/10oz self-raising flour
325g/12oz butter, softened
5 free-range eggs