Michigan State University Extension
Preserving Food Safely - 01600900
Measure jelly to be recooked. Work with no more than 4 to 6 cups at a time.
To remake with powdered pectin: For each quart of jelly, mix l/4 cup sugar, l/2 cup water, 2 tablespoons bottled lemon juice, and 4 teaspoons powdered pectin. Bring to a boil while stirring. Add jelly and bring to a rolling boil over high heat, stirring constantly. Boil hard l/2 minute. Remove from heat, quickly skim foam off jelly, and fill hot, sterile jars (see directions below for sterilizing jars), leaving l/4-inch headspace. Adjust new lids and process.
To remake with liquid pectin: For each quart of jelly, measure 3/4 cup sugar, 2 tablespoons bottled lemon juice, and 2 tablespoons liquid pectin. Bring jelly only to boil over high heat, while stirring. Remove from heat and quickly add the sugar, lemon juice, and pectin. Bring to a full rolling boil, stirring constantly. Boil hard for l minute. Quickly skim off foam and fill hot sterile jars, leaving l/4-inch headspace. Adjust new lids and process.
To remake without added pectin: For each quart of jelly, add 2 tablespoons bottled lemon juice. Heat to boiling and boil for 3 to 4 minutes. Use one of the tests described under "Standard or long-boil jelly" to determine jelly doneness. Remove from heat, quickly skim off foam, and fill hot, sterile jars, leaving l/4-inch headspace. Adjust new lids and process.
Sterilization of Empty Jars
To sterilize empty jars, place them right side up on the rack in a boiling-water canner. Fill the canner and jars with hot (not boiling) water to 1 inch above the tops of the jars. Boil 10 minutes at altitudes of less than 1,000 feet. At higher elevations, boil 1 additional minutefor each additional 1,000 feet elevation. Remove and drain hot sterilized jars one at a time as filled.
RECOMMENDED PROCESS TIME FOR REMADE SOFT JELLIES IN A BOILING-WATER CANNER
Process Time at Altitudes of Style of Jar 0- 1001- 6001- Pack Size 1000 ft. 6000 ft. 8000 ft.
Hot Half-pints 5 min. 10 min. 15 min. or pints