Then keep them hot until they are filled with the hot fruit mixture. To prepare fruit for jam, sort and wash fully-ripe fruit. Remove any stems, caps, or pits. Peel fruits such as peaches and apricots. Crush the fruit.
Jams contain fruit pulp or pieces of fruit, which tend to stick to the kettle during cooking.
Stir constantly to prevent scorching. For jams or jellies, the method of combining ingredients varies with the form of pectin used. The full-boil stage is reached when bubbles form over the entire surface of the mixture. Stir in artificial sweetener, food coloring, powdered fruit pectin, and lemon juice. Bring to a boil and boil 1 minute.