Chantilly cream is whipped cream - but you have to dress up to eat it.
Chantilly cream, or crème chantilly to use the French and impress your friends, is simply sweetened whipped cream flavored with vanilla or brandy. In this country, we take the sweetened part for granted when we refer to whipped cream, although, of course, unsweetened whipped cream is used to give volume and flavor to a number of savory recipes. There are those who will tell you Chantilly cream is a lightly whipped cream (that is to say, not stiff and heading towards butter), but there are those who will disagree with this assertion. Chantilly cream is often piped into decorative shapes.