Mint frosting
Icing or frosting was a flavored decorative topping used to adorn cakes, cookies or brownies. It was made with various ingredients, including sugar, butter, cream, and different flavors such as vanilla, chocolate or strawberry.
The illusory cellular peptide cake from Data's dream in 2370 had mint frosting. (TNG: "Phantasms")
In 2371, Neelix put icing made from pureed l'maki nuts on Kes' birthday cake. (VOY: "Twisted")
Frosting could also be used as a metaphor for inane topics. In 2372, Harry Kim told Neelix that he didn't care for all the frosting on "A Briefing with Neelix" (such as recipes, music, and jugglers), preferring real journalism instead. (VOY: "Investigations")