Jimbalian fudge

From Memory Alpha, the free Star Trek reference.

Jimbalian fudge was a type of fudge originating in the Delta Quadrant that could be used to make cake.

Neelix prepared a seven-layer Jimbalian fudge cake with icing made of pureed l'maki nuts for Kes' second birthday in 2372. (VOY: "Twisted")

In 2376, after losing his memory, Tuvok prepared many desserts, including a Jimbalian fudge cake with peppermint coulis, while he was being reeducated by Neelix. Tuvok drew a Ba'neth frequency pattern on the cake's icing while trying to recover his memory. (VOY: "Riddles")

Kathryn Janeway appeared to have replicated a small cake like this for Tuvok after discovering his birthdate. (VOY: "Fury")

It may not have been an actual Jimbalian fudge, but it did seem to have pureed l'maki nut frosting.

In an alternate timeline, Neelix prepared a Jimbalian fudge for Kes on her ninth birthday in 2379. (VOY: "Before and After")

A recipe for Jimbalian fudge cake, adapted for terrestrial kitchens, can be found in the Star Trek Cookbook.