Brian Trueman wrote:
Hi, I have a problem with some jam I recently made from frozen blackberries.
The sugar came back out of solution in the jars after it had been canned.
What caused this and what can I do to prevent it from happening again.


Were you thinking that the freezing of the blackberries was part of your
problem? If so, the only difficulty with using frozen fruit is in how
you decide to measure. If it is volume measure using crushed fruit, the
thawed berries may be squishier than raw but unfrozen ones, altering
your measure.
Ellen