This time, we made a couple of changes. We peeled the peaches, making the jam a little paler than our last batch. And instead of using the plate-in-the-freezer trick to determine when the jam was finished cooking (apparently a nuanced technique that we have not mastered), we relied on a candy thermometer. We'd read 220 degrees was a good target, so we set off boiling the jam and watching the thermometer.
Then, we panicked. We turned off the heat and called it an afternoon. Now that the jam has cooled, it's perfectly lovely. Maybe a little on the thin side, but certainly spreadable and preferable to the alternative. So, our advice is: Shoot for 220 degrees. Don't worry if you panic.
Peach, Plum, and Ginger Jam
makes about two cups
2 dozen small, yellow plums*
4 medium peaches
1 teaspoon grated, fresh ginger
2 cups sugar
1 lemon, juiced
Cut the plums away from their pits and into chunks. Pit and peel the peaches and cut into chunks. You should have about four cups of fruit. Add fruit and the rest of the ingredients to a large sauce pan.
Heat the mixture over medium-high heat until it comes to a boil. Continue to boil, stirring constantly, mashing the fruit into small pieces as it softens and cooks. (We actually got a potato masher in there at one point, since our chunks were too big.) Cook until a candy thermometer reaches 220 degrees, about 20 to 25 minutes.
Remove from heat, cool, and store in an airtight container in the refrigerator.
*This happened to be what we had. You could certainly try this recipe with other kinds of plums or even all peaches.Help! Our Jam Is Too Hard! How To: Use Up Overripe Fruit
(Images: Elizabeth Passarella)