"To make the best possible jam, you need the best possible fruit," says Chris Austin of Ace Jams, which produces limited-edition runs of market-driven flavors. Austin describes himself as "very meticulous about sorting" the fruit, which can lead to very small batches of individual flavors. "Quince sold out in a week and a half," he explains, "because the quinces weren't very good this year." More

The season for Concord grapes has long come and gone, but the flavors of these sweet candy-like grapes are preserved in jars of concord grape jelly by Ace Jams. More