Doughnut

A donut, sometimes spelled doughnut, (COMIC: The Eternal Dogfight) was a food item from Earth. Chris Cwej had some donuts and an espresso in Canada in 2040. (PROSE: The Nuclear Option) Very similar food was also known to other races, such as Amstrons. (COMIC: The Eternal Dogfight)

The Fourth Doctor was in the mood for donuts when he landed on Vita Novus. After Madame Karna was defeated, Sibella Bing gave the Doctor a bag of donuts in gratitude. (AUDIO: The Beautiful People)

Matildus Galathea gave Grovian doughnuts to the Kaballus Kids: Lozz, Zeddy, Sparks and Morpho. (COMIC: Matildus)

The Sixth Doctor likened the shape of the stars of the pre-universe to giant donuts. (PROSE: Millennial Rites)

Ace gave Melanie Bush the nickname "Donut". (TV: Dragonfire; AUDIO: A Life of Crime, Fiesta of the Damned, The Blood Furnace)

Behind the scenes

A donut with pink icing and rainbow sprinkles. (WC: Endless Awesome)

References in invalid sources

A donut was present in a room within which a child used a LEGO Gateway. Homer Simpson appeared out of it, having been eating it. (WC: Endless Awesome)