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) Their packaging featured their logo in red text with a yellow contour in front of a black background. (TV: The Vanquishers)

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)

Mars Bars were among the products sold at M.A. Local Supermarket in 2021. Sontaran Commander Shallo ate Mars bars, along with several other brands. (TV: The Vanquishers)