Birthday cake
From Memory Alpha, the free Star Trek reference.
A birthday cake is a cake served to a person on his or her birthday. A birthday cake is often decorated with small candles. Human tradition holds that the person with the birthday may make a wish, which will come true if all the candles can be blown out in one breath.
On September 1, 2151, the crew of the Enterprise threw Malcolm Reed a birthday party complete with a pineapple birthday cake. (ENT: "Silent Enemy")
For Kes' second birthday in 2371, the USS Voyager crew threw a surprise party for her. Neelix made a seven layer Jimbalian fudge birthday cake with l'maki nut icing and punch. (VOY: "Twisted")
In 2373, Miles O'Brien's birthday celebration included a birthday cake which was actually made by a Pah-wraith which was possessing his wife, Keiko, at the time. (DS9: "The Assignment")
In 2376, Janeway had to search the databanks for hours on end, but eventually found Lieutenant Commander Tuvok's birthday, and replicated him a cake with a candle on it. He claimed that this was a Human tradition, and Vulcans do not "blow out candles." In the end, he blew it out, claiming that "it was a fire hazard." (VOY: "Fury")
