When I was very young, I watched my grandma make this jam in the kitchen. As I sneaked blueberries to snack on, she picked me up and told me that if I wanted any more, I'd need to learn to make this jam! —Jill Drury, River Forest, Illinois

Canning Altitude Jam-Jelly

The processing time listed is for altitudes of 1,000 feet or less. Add 1 minute to the processing time for each 1,000 feet of additional altitude.