McCormick Non-GMO Kosher Celery Flakes, 0.5 oz Bottle. McCormick Celery Flakes always start with fresh, whole celery. So convenient, it makes it easy to add celeryâs bright color and balanced flavor to stuffings, potato salads, soups and more. Celery adds mild, aromatic flavor which is why so many recipes start with chopped celery. Celery along with onions and carrots make up mirepoix, the French vegetable base that begins many soups, stews and braises. Keep Celery Flakes in your pantry so you...