Sure Jell Blackberry Freezer Jam Recipe. Crush 1 cup of berries at a time with a potato masher for best results. Add to fruit mixture.
Rinse with warm water. If using a food processor pulse to fine chop. Kids love it so get them involved in the entire process from picking the berries to making the jam.
Crush berries with a potato masher or any other tool until desired consistency.
Bring to a full boil and boil 1 minute stirring constantly. At once stir into fruit and continue stirring 3 minutes. Let stand in hot water until ready to use. Add 1 cup of sugar and 13 cup of freezer jam pectin to the blackberries.