Mars Bar

Mars Bars were a popular candy on Earth in the 20th century. The Sixth Doctor had Mars Bars in the TARDIS food machine. (DWM: Voyager)

Ian Chesterton described one of the 'eggs and bacon' food blocks that he and Barbara were served with by the First Doctor from the food machine as looking like "a Mars Bar on a paper plate, except that it had the colour of white icing" (quote, page 46). (Doctor Who in an Exciting Adventure with the Daleks)

Chris Parsons was served with "an object something like a white-coloured Mars bar" (quote, page 149) when he set the dials of the 'minibar' (actually a food machine) in the guest suite aboard the Doctor's TARDIS to K12, but this particular food block tasted of steak and candy floss – not very tasty! (Shada (novelisation))