Whipped cream
From Memory Alpha, the free Star Trek reference
Whipped cream is sweetened, heavy cream that is whipped and thereby mixed with air.
In 2366, Deanna Troi was longing for a "real chocolate sundae" with chocolate ice cream and whipped cream. (TNG: "The Price")
Tom Paris enjoyed raktajino with whipped cream on top. (VOY: "Meld")
