Whipped cream was sweetened, heavy cream that was whipped into a light froth.
Deanna Troi liked whipped cream. In 2366, weary of computer-generated imitations, she asked the replicator for a "real chocolate sundae" with chocolate ice cream and whipped cream. (TNG: "The Price")
In 2370, she introduced Loquel to some of her favorite treats, including peach cobbler with whipped cream. (TNG: "Liaisons")
Tom Paris enjoyed raktajino with whipped cream on top. In 2372, he decided to have one after taking his cut of replicator rations in the Paris Radiogenic Sweepstakes. (VOY: "Meld")