Although it may be tempting to skip the step of boiling a separate pot of water to cook the wontons, it's important to cook the wontons separately from the soup. Each wonton wrapper is coated with cornstarch to prevent them from sticking to each other. u003cbr/u003eu003cbr/u003eEven though it is a small amount, the cornstarch will transfer into the soup and affect its appearance and taste. It will also cause the soup to get a little cloudy and murky.