We love making our own, but we also understand that sometimes it’s more convenient to pick up premade stock. Flavors can vary widely by brand, so our suggestion is similar to the standard for cooking with wine—just as it’s best to cook with wine that you’d enjoy drinking, it’s also best to cook with a stock that you enjoy the flavor of on its own. Different stocks can also have strikingly different levels of salt, so when using premade ones, it’s especially important to add the prescribed salt to the soup to taste.