Everyone knows the Jaffa Cake is a quintessential British classic, and has been ever since its introduction way back in 1927. The McVities Jaffa Cake Bar is the natural progression from the much loved Jaffa Cake.McVities Jaffa Cake Bars do much the same job as the Jaffa Cake, but with a few subtle differences. The cake is a much softer sponge and the jelly is also softer than that of it predecessor, but that classic Jaffa Cake taste still prevails.