Shortcake isn't shortcake without whipped cream on top. You can either buy a can, a tub of cool whip or make it from scratch. Do what is easiest for you! Traditional homemade whipped cream is pretty much the easiest thing on earth to make and only uses a few ingredients. We like to add a little Greek yogurt to ours to help stabilize it so it can be made ahead of time and still keep the creamy consistency.