Doughnut
From Memory Alpha, the free Star Trek reference.
A doughnut is an Earth pastry consisting of a ring-shaped portion of dough, which can be covered with various toppings.
When a group of Vulcan physicians came to the Enterprise during an Interspecies Medical Exchange conference in 2152, Captain Jonathan Archer remarked to Subcommander T'Pol that "they're not coming up for coffee and doughnuts". (ENT: "Stigma")
In Benjamin Sisko's vision of 1950s Earth in 2374, Douglas Pabst brought doughnuts for the staff of Incredible Tales each day. However, his co-worker Herbert Rossoff accused him of bringing stale doughnuts and threatened to quit. Pabst maintained that the doughnuts he brought in had been baked no more than six hours ago, while Rossoff believed them to be a day old. (DS9: "Far Beyond the Stars")
