Many people consider chicken soup a comfort food.
comfort food definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Informal any food eaten not only for its pleasing taste but also for a sense of contentment, nostalgia, etc. that it provides
comfort food definition by American Heritage Dictionary
Food that is simply prepared and associated with a sense of home or contentment.