Chantilly is the centre of an urban area that includes the communes of avilly-saint-léonard, boran-sur-oise, coye-la-forêt, gouvieux, lamorlaye and vineuil-saint-firmin. It is the third-largest urban area … It’s a basic whipped topping that is made from heavy cream that is at least 35% milk fat, combined with super fine or confectioner’s sugar, and whipped into stiff peaks.