Tana Harter expressed that adding apple cider vinegar to her chili not only improved the flavor but also secured her a $25,000 prize at the championship. She described it as a crutch, saying, 'It was a crutch for me for a while,' showcasing her reliance on this ingredient to enhance her dish. Harter’s experience underlines how crucial a secret weapon can be in a competitive cooking environment, particularly in chili cook-offs, where flavor is paramount.