Hi, Vivian. We have a note on some of our recipes that call for boiled cider: "Substitute frozen apple juice concentrate, if you choose; the flavor won't be quite as good." I wouldn't recommend it simply because the flavor is very sweet and lacks the lovely molasses-y flavor, sour, and bitter notes that apple cider creates. If apple cider isn't available in your local stores and you want to try using the apple juice concentrate, I'd leave it as is rather than cooking it down further since it's already quite concentrated. Happy baking! Annabelle@KAF

• Reply