It’s #FoolproofPreserving launch day! Get ready for blueberry season with our Classic Blueberry Jam. The key to a silky jam and fresh blueberry flavor is to cook the berries gently and quickly with lemon juice and zest before adding pectin. Find this recipe—and 100+ more—in our #FoolproofPreserving Cookbook—now available in bookstores! Order online with the link clickable in our bio.