Jelly
Jelly differs from jam and marmalade in that only the fruit juice, not the fruit itself, is used. To make jelly, you will need to either buy a jelly bag or make one. To do this, line a colander with several thicknesesses of cheesecloth, which are first scaled with boiling water, cooled and wrung dry. Set the colander over a large bowl, pour in the cooked fruit, and tie the cheesecloth to make a bag. Suspend the bag over the bowl by tying it with string to the handle of a kitchen cabinet. Let it drip overnight. Be patient. If you hasten the dripping of the juice by squeezing the bag when it is full of fruit pulp, the jelly will be cloudy.
Apple Jelly
4 pounds green apples
½ cup lemon juice
3 cups water
Sugar
Wash and cut up the fruit without peeling or coring it. (The seeds and skin contain the most pectin, so they should be cooked with the fruit to assure a firm jelly.) Cover the fruit with water, add the lemon juice, and boil until tender. Remove from heat, mash and strain the fruit. Following the directions for a jelly bag above, measure the resulting juice and add 1 cup of sugar for each cup of juice. Boil until the candy thermometer reads 220 degrees Fahrenheit, turn off the heat and skim the froth. Fill and cap the jars.
Mint Jelly
3 pounds green apples
3 cups water
2 cups white vinegar
1 cup firmly packed mint leaves and stems
Sugar
2 or 3 drops green food coloring
Wash and cut up the apples; do not peel or core them. Put apples, mint and water in a saucepan and simmer until apples are tender; then mash. Add vinegar and boil for 4 minutes. Strain (see directions for jelly bag, above), and measure the juice. Add 1 cup of sugar for each cup of juice. Boil until candy thermometer registers 220 degrees Fahrenheit. Add a few drops of green food coloring skim the froth, and fill and cap the jars. The addition of vinegar to the recipe makes a tart, rather than sweet, mint jelly.