Mars Bar

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

History
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 the colour of white icing. (PROSE: Doctor Who in an Exciting Adventure with the Daleks)

Chris Parsons set the dials of a food machine in the guest suite aboard the Doctor's TARDIS to K12, which produced something that looked like a white-coloured Mars Bar, but tasted like steak and candy floss. (PROSE: Shada)

The Fourth Doctor described Scottish to Leela as "haggis, bagpipes, Robbie Burns and deep-fried Mars Bars". (PROSE: The Very Last Picture Show)

On an alternate Earth, the Seventh Doctor shared a Mars Bar with Ace. (PROSE: Blood Heat)