I just made this today for the first time. It is by far my favourite raspberry jam I've made.
Ingredients:
5 cups (1250 ml) crushed raspberries
1/2 tsp butter (optional)
1/4 cup (60 ml) maple syrup
1 pkg (57 g) BERNARDIN Original Fruit Pectin
7 cups (1750 ml) granulated sugar
Instructions:
Place 8 clean 250 ml mason jars on a rack in a boiling water canner; cover jars with water and heat to a simmer. Set screw bands aside. Heat sealing discs in hot water, not boiling. Keep jars and sealing discs hot until ready to use.
Wash and crush raspberries, one layer at a time; measure 5 cups.
Measure sugar; set aside.
In a large deep stainless steel saucepan, stir together prepared berries, 1/2 tsp butter or margarine to reduce foaming, maple syrup and Pectin.
Over high heat, bring mixture to a full rolling boil. Add all of the sugar. Stirring constantly, return mixture to full rolling boil that cannot be stirred down. Boil hard 1 minute, stirring constantly. Remove from heat; skim off foam, if necessary.
Ladle hot jam into a hot jar to within 1/4 inch of top of jar (headspace). Using nonmetallic utensil, remove air bubbles and adjust headspace, if required, by adding more jam.
Wipe jar rim removing any food residue. Centre hot sealng disc on clean jar rim. Screw band down until resistance is met, then increase to fingertip tight. Return filled jar to rack in canner. Repeat for remaining jam.
When canner is filled, ensure that all jars are covered by at least one inch (2.5 cm) of water. Cover canner and bring water to full rolling boil before starting to count processing time for10 minutes.
When processing time is complete, turn stove off, remove canner lid, wait 5 minutes, then remove jars without tilting and place them upright on a protected work surface. Cool upright, undisturbed 24 hours; DO NOT RETIGHTEN screw bands.
After cooling check jar seals. Sealed lids curve downward and do not move when pressed. Label and store jars in a cool, dark place. For best quality, use within one year.