Weigh all your ingredients, using a “one-third ratio”: I weigh all the chopped fruit and then divide that number by three. The resulting number is the amount of sugar I use. Many commercial companies ...

This story is a component of the feature “Seasons of Preserves: Berry Jelly,” which is part of a four-part series on preserving fruit at home called “L.A. in a Jar.” Here are the four main steps in ...