The Big Chocolate Box - featuring KitKat, KitKat Crunchie, Munchies and Mint Aero - is currently £22.16 for a one off purchase. With 30 chocolates, that's 74p per bar.

600 ml double cream 397 g condensed milk 2 x 90 g Mint Aero bars or a 175 g bag of Maltesers, plus extra to serve ...