preserving berries5/14/97

PRESERVING BERRIES


Freezing Berries
About Blackberries
Canned Berry Pie Fillings
Berry Syrup
Drying Berries
Berry Vinegars

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FREEZING BERRIES

Spring berries are some of the most flavorful and colorful fruits. Their season is often short, so if you do not have time to preserve them as jams, jellies, vinegars, and syrups now, simply freeze them for later recipes.

When freezing any food , pack it to allow for 10% expansion (food is mostly water and water expands when turning to ice)



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Blackberries, Boysenberries, Marionberries, Tayberries, Loganberries, Raspberries

Both blackberries and raspberries have eight chromosomes so crosses are easily made. The hybrids resemble their parent plants but often have improved flavor, color, or thornlessness. They are all frozen the same way.

Rinse fruit and drain. If you wish to have pourable frozen berries, blott them dry on towels, freeze initially on cookie sheets, then seal in air-tight freezer containers or freezer bags. Alternatively, berries can be packed in sugar syrup, packed in dry sugar, or packed without sugar directly in freezer containers or freezer bags.

Blueberries & Huckleberries

Rinse and drain. These can be packed directly in sugar-syrup or dry sugar, or without sugar, but they will be more intact when thawed if the skin is first tenderized. To tenderize the skin, steam for 1 minute then plunge immediately into cool water. After tenderizing, pack for freezing as above.

Strawberries

Rinse and drain, remove hulls. Strawberries can be frozen whole or sliced. They can be packed in syrup, dry sugar, or without sugar. Strawberries do not hold their shape well when frozen. They will hold their color better if packed in sugar.

CANNED BERRY PIE FILLINGS

The only thickening agent that can safely be used in canning is Clear Jel. This is a modified starch that remains thin enough when hot for heat transfer. If flour or regular corn starch were used to thicken a filling, the thickness of the gel would prevent adequate heat penetration to the center of the jar, and under processing would result. (Underprocessed jars are safety hazards.) The quality would also be poor because regular starch gels do not maintain desirable consistency when canned.

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BLACKBERRY PIE FILLING

6 quarts fresh blackberries
7 c white sugar (can make slight adjustments for tartness of berries)
1 3/4 c Clear Jel
1 tsp cinnamon
9 1/3 c water
1/2 c bottled lemon juice (this is for safety, do not decrease amount)
A wire whip and rubber spatula for stirring


Select top quality, firm, ripe berries. Rinse berries and set aside. Measure lemon juice and set aside.

Combine Clear Jel, sugar, and cinnamon in a large saucepan. Add water and mix until smooth. Stirring during the thickening process is critical for a smooth end product. If you are not able to stir fast enough, remove the pan from the heat until you can catch up, then return it. Heat, stirring mixture constantly, until it bubbles.
Quickly add lemon juice and boil 1 minute, stirring constantly. (You may add more water at this point if you wish to have a berry topping instead of pie filling.) Remove from heat and fold in berries. Fill 7 quart jars, leaving 1 to 1.5 inches head space. Process in a boiling water canner for 30 minutes at sea level, 35 minutes at altitudes between 1001 and 3000 feet, and 40 minutes at altitudes between 3001 and 6000 feet.

Each quart of canned filling makes an 8 or 9-inch pie. Call your local Cooperative Extension office for the nearest source of Clear Jel. This recipe adapted from Pennsylvania State University Extension Service.

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BERRY SYRUP

If you are unfamiliar with making your own berry fruit juice, consult the basic canning sources listed on the main menu.

1 1/4 c fruit juice
1 1/2 c sugar
1/4 c white corn syrup
1 Tb lemon juice (optional)

Combine all in a saucepan and bring to a boil; boil 1 minute. Remove from heat, skim off foam and ladle into clean hot jars. Process 10 minutes in boiling water canner. Alternatively this can be put into a clean, hot bottle, corked and stored in the refrigerator 2 weeks.
Recipe from Leona June, Portland, OR, original source unknown.

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DRYING BERRIES

If berries are seedy, when dried they tend to be mostly crunch and very little flesh. Strawberries have small seeds and dry acceptably. The seeds can be removed from blackberries and the puree used in leathers. If you are unsure how to use a food dryer, consult your local county Cooperative Extension Service.


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YOGURT FRUIT LEATHER

8 oz plain yogurt
2 Tb sugar
6 cups berries or berry puree

Place all ingredients into blender until just combined. (Too many air bubbles alter the leather consistency.) Dry for 8 to 10 hours, (140F minimum temp.) following your dryer's instructions. Store in airtight container at room temperature for a short time, or freeze for long term storage. Yogurt Fruit Drops can be made using this recipe by dropping 1 tsp amounts on the dryer trays. Drying time for drops is shorter.


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BERRY VINEGARS

Berries have concentrated color pigments that make lovely vinegars. Berry vinegars on fruit salads are classic summer gourmet treats. Berry vinegars can also be used to flavor and color club soda for a not-too-sweet hot weather beverage.

RASPBERRY VINEGAR

3 qts raspberries
1 pint white wine vinegar
sugar (amount determined later)

Place fruit in glass bowl and crush it to release juices. Add the vinegar. Cover and let stand approximately 20 hours in a cool, dark place. Strain through several layers of cheesecloth, or a coffee filter, or a jelly bag. Measure the liquid then mix with an equal amount of sugar. Place in a saucepan and bring to a boil then simmer 10 minutes. Remove from heat. Let stand, covered, overnight.

Slowly decant the vinegar into bottles that have been freshly washed in the dishwasher. Let the bottles rest in the dishwasher rack upside down until you are ready to fill each one; this decreases the amount of molds and yeasts that can enter the jar. Discard the sediment. Cap and store in a cool, dark place.
Recipe adapated from Oregon State University Extension Service


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