Grape Jam Recipes

Steps:

• Bring boiling-water canner, half full with water, to simmer. Wash jars and screw bands in hot soapy water; rinse with warm water. Pour boiling water over flat lids in saucepan off the heat. Let stand in hot water until ready to use. Drain well before filling.
• Slip skins from grapes. Finely chop or grind skins; set aside. Mix grape pulp and water in saucepan. Bring to boil. Reduce heat to low; cover and simmer 5 min. Press through sieve to remove seeds. Combine skins and pulp. Measure exactly 6 cups prepared fruit into 6- or 8-qt. saucepot.
• Stir in pectin. Add butter to reduce foaming. Bring mixture to full rolling boil (a boil that doesn't stop bubbling when stirred) on high heat, stirring constantly. Stir in sugar. Return to full rolling boil and boil exactly 1 min., stirring constantly. Remove from heat. Skim off any foam with metal spoon.
• Ladle immediately into prepared jars, filling to within 1/4 inch of tops. Wipe jar rims and threads. Cover with two-piece lids. Screw bands tightly. Place jars on elevated rack in canner. Lower rack into canner. (Water must cover jars by 1 to 2 inches. Add boiling water, if necessary.) Cover; bring water to gentle boil. Process 10 min. Remove jars and place upright on towel to cool completely. After jars cool, check seals by pressing middles of lids with finger. (If lids spring back, lids are not sealed and refrigeration is necessary.)

Steps:

• Sterilize jars:
• Wash jars, lids, and screw bands in hot, soapy water, then rinse well. Dry screw bands. Put jars on a rack in canner or deep pot and add enough water to cover by 2 inches. Bring to a boil, covered, then boil for 10 minutes. Remove from heat, leaving jars in water. Heat lids in water to cover by 2 inches in a small saucepan until thermometer registers 180°F (do not let boil). Remove from heat, leaving lids in water. Keep the jars and lids submerged in hot water, covered, until ready to use.
• Cook jam:
• Chill 2 small plates (for testing jam).
• Slip skins from grapes and purée skins with 1 cup sugar in a food processor, then transfer to a 4- to 6-quart wide heavy pot. Stir in lemon juice, peeled grapes, and remaining 4 cups sugar and boil over moderate heat, stirring frequently and skimming foam, until pulp is broken down, about 20 minutes. Force jam through food mill set over a large bowl. Discard remaining solids. Return jam to pot and cook at a slow boil, skimming foam occasionally and stirring frequently as mixture thickens to prevent scorching, 35 minutes, then test for doneness.
• To test jam, remove from heat, then drop a teaspoonful on a chilled plate and chill 1 minute. Tilt plate: Jam should remain in a mound and not run. If jam runs, continue cooking at a slow boil, testing every 5 minutes, until done, up to 25 minutes more.
• Seal, process, and store jars:
• Drain jars upside down on a clean kitchen towel 1 minute, then invert. Ladle jam into jars, leaving 1/4 inch of space at top. Wipe off rims of filled jars with a clean damp kitchen towel, then top with lids and firmly screw on screw bands. Put sealed jars on rack in canner or pot and add enough water to cover by 2 inches. Bring to a boil, covered, then boil 10 minutes. With tongs, transfer jars to a towel-lined surface to cool.
• Jars will seal; if you hear a ping, it signals that vacuum formed at the top of cooling preserves has made lid concave. Remember that you may or may not be around to hear that ping (some jars make the sound after you remove them from water, and others in same batch may take a few hours); the important thing is for jars to eventually have concave lids. Preserves will thicken as they cool.
• After jars have cooled 12 to 24 hours, press center of each lid to check that it's concave, then remove screw band and try to lift off lid with your fingertips. If you can't, lid has a good seal. Replace screw band. Put any jars that haven't sealed properly in the refrigerator and use them first.

Steps:

• Tip the grapes into a large saucepan set over a low heat, then cover and leave to gently cook for 5 mins until the juices start to run. Take a potato masher or fork and mash up the grapes. Leave to cook for about 10 mins more, mashing every now and again until the grapes are falling apart. Place a clean tea towel or kitchen cloth in a sieve set over a bowl, then pour the grape mixture into this. Let the mixture drip through for at least 1 hr or preferably overnight.
• Measure out the juice (you should have about 600ml) and pour it into a pan along with the sugar and lemon juice. Set the pan over a high heat and bring to the boil. Skimming any scum as it boils, let the mixture bubble until the temperature reaches 105C on a sugar thermometer. If you don't have one, put a small plate in the freezer for 5 mins, then pour a little of the juice onto the cold saucer. After 1 min, run your finger through; if the jam wrinkles slightly, it's ready. Pour the hot jam into a sterilised jar. Will keep unopened for up to 3 months.

Steps:

• Remove the skins from the pulp and set them aside.
• Place grape pulp in stainless jelly pot with water.
• Bring to boil and simmer 5 minutes.
• Strain to remove the seeds.
• Chop the skins and add to the cooked pulp.
• Measure out 5 cups of the grape pulp mixture and return the pulp to jelly pot.
• Add sugar and butter.
• Heat on medium heat until sugar is melted, then adjust to high heat.
• Heat and stir to full rolling boil that will not stop.
• Add 1 pouch Certo and return to full rolling boil at high heat.
• Boil exactly one minute stirring constantly.
• Fill jars to 1/8 inch from the top.
• Seal with lids.
• Invert jars for 5 minutes.