Making jams, marmalades, preserves and conserves (2024)

Canning jams, marmalades, preserves and conserves

Equipment needed for canning

• Large, flat bottom kettles (6-8 quart size).
• Wooden spoons and metal spoons.
• Jelly or candy thermometer.
• Standard canning jars with two-piece lids.
• Boiling water bath canner.

Filling jars and heat processing

Properheat processingseals in food quality and destroys bacteria, yeast and molds that can cause food to spoil. See our home canning basicsfor more information on canning.

Note:Paraffin wax is no longer recommended for sealing jars. Paraffin does not form a complete seal and does not protect against mold growth and toxin production in jelly. The process is a potential health risk.

Recommended procedure

• Use standard jars with 2-piece lids.
• Clean the jars and keep them hot.
• Pack product to within ¼ inch of top and seal.
• Heat process in boiling water bath canner according to the chart below.
• Count time from when water returns to boil after putting the jars in the water.

Processing time in a boiling water canner for jams and jellies

Jar size: Half or quarter pints

• Elevation:0-1000 feet |Processing time:5 minutes.
• Elevation:1001-2000 feet |Processing time:6 minutes.
• Elevation:2001-3000 feet |Processing time:7 minutes.

Jar size: Pints

• Elevation:0-1000 feet |Processing time:10 minutes.
• Elevation:1001-2000 feet |Processing time:11 minutes.
• Elevation:2001-3000 feet |Processing time:12 minutes.

Preparing with or without added pectin

The two main methods for preparing jams, marmalades, preserves and conserves are by cooking fruit and sugar either:

• With no added pectin.
• Withadded pectin.

No added pectin

Jams, preserves, conservesand marmalades made without added pectin:

• Require longer cooking.
• Have a slightly different flavor from those with added pectin.
• They also yield a less finished product.
• The product is done when the temperature reaches 220–222degrees F.

Added pectin

When using powdered or liquid pectin, be sure to follow the directions that come with the pectin product. The order of combining ingredients depends on the type of pectin used.

Successful preparation of pectin-added jams, marmalades, preserves and conserves depends on accurate timing. Begin counting time when the mixture reaches a full rolling boil that cannot be stirred down.

Freezer or refrigeratorjam does not require cooking the fruit.

See Also

National Center for Home Food Preservation - National Center for Home Food Preservation

The jam is done when 2 big drops slide together and form a sheet that hangs from the edge of the spoon.

Making Freezer Jam

Raspberries, strawberries and blackberries work well in uncooked freezer jam recipes. Uncooked jams must be stored in the refrigerator or freezer. They'lllast for several weeks in the refrigerator and up to a year in the freezer. Once you open the container, keep refrigerated and use the jam within 2-3 weeks.If you keep them at room temperature, they will mold or ferment in a short time.

Prepare your fruit

1. Sort and wash fully ripe fruit. Drain.
2. Remove caps and stems from berries and crush.

• If you use frozen fruit, these first stepshave already been done.
• If you froze the fruit yourself with sugar added: You should have labeled the container with how much fruit and sugar you added before freezing. Subtract thatamount of sugarfrom what is called for in the freezer jam recipe.

Follow the instructions on the powdered pectin package or use this basic recipe.

Uncooked jam with powdered pectin recipe

• 2 cups crushed berries (about 1-1/2 quarts of berries).
• 4 cups sugar.
• 1 package powdered pectin.
• 1 cup cold water.

To make the jam:

1. Add 2 cups of prepared fruit toa large mixing bowl.
2. Add the sugar andmix well.
3. Let the mixture stand for20 minutes, stirringoccasionally.
4. Dissolve powdered pectin in 1 cup cold water in a saucepan.
5. Bringto a boil and boil for 1 minute.
6. Add pectin solution to the fruit and sugar mixture.
7. Stir vigorously for 2-3 minutes until the sugar is completely dissolved and no longer grainy.

Put the jam into containers and freeze:

1. Pour the jam into clean freezer containers or canning jars, leaving 1/2-inch headspace. (Plastic freezer containers with tight-fitting lids work well for storing freezer jams and jellies.)
2. Cover the containers and let stand for 24 hours, or until the jam has set and become firm.
3. Freeze containers.
4. This quantity makes about 5 or 6 half-pint jars or freezer containers.

Freezer jam is less firm than cooked jam but has more of a fresh-fruit taste.

To use jam:

• When jam comes out of the freezer, thaw overnight in the refrigerator.
• If the jam is too firm, you can soften it by stirring. If it tends to separate, stirring will blend it again.
• If freezer jam is too soft, bring the jam to a boil in a saucepan for 1minute and it will thicken as it cools.

Low-sugar jam: If you want to reduce the amount of sugar, use a modified low- or no-sugar pectin that allows you to do so. Follow the pectin package directions carefully.

Follow thesetips to create successful jams and jellies from frozen fruit or juice:

• The best frozen fruits for jams or jellies are blueberries, red and black currants, gooseberries and rhubarb.
• Before freezing fruit, measure the fruit and label the container. Many fruits collapse as they thaw and may create an inaccurate measure.
• Jams and jellies from frozen fruit and juice are better if no sugar is added to the fruit and juice before freezing.
• When freezing fruit for jelly or jams, use 1/4 under-ripe and 3/4 ripe fruit.
• Thaw frozen fruit in the refrigerator until only a few ice crystals remain. Follow directions for the type of jam you are making and follow the recommended proportions of fruit (measured before freezing), pectin and sugar.

When making jelly from frozen juice, thaw frozen juice in the refrigerator overnight. Measure juice and use it immediately in recommended proportions with sugar and pectin.