Chicken soup is great when it's cold but usually tastes bland. However, you can make your soup taste better and clarify its aroma with ½ cup of a neutral spirit.
Chef Taewoo Kim suggests splashing a little vodka or soju into your soup, as they both contain a neutral flavor profile that enhances chicken soup's savory, salty flavors.
The result is a dish with an added kick. Because alcohol evaporates faster than water, the molecules reach your nose faster, so you perceive the soup as smelling stronger.