For a classic peach jam, we relied on sugar to bring out the sweetness of the peaches and lemon juice to add brightness and acidity.
A cookbook recipe exclusively for All-Access members from Foolproof Preserving
A shredded apple provided enough natural pectin for just the right set. Leaving the skins on the peaches created a pretty rose-tinted jam and intensified the peach flavor, and a shortened cooking time retained that flavor.