can blackberry jam that has not setup be fixed or redone?

Answer 1

It looks like you can try to re-cook it if you are careful, just adding some more pectin to the recipe and cooking it a few cups at a time. Here are a couple links you might find useful:

http://www.mrswages.com/faq.asp#17

(look at question 17, talks about strawberry jam, but this would be the same kind of thing)

http://muextension.missouri.edu/explore/qa/foodnutrition0010.htm

Good luck to you :-)

Answer 2

I'm assuming you did the cooked kind, not freezer jam. You could try but you will be cooking a second time which will break down the berries even more.
A friend and I made grape jelly one time and we had miscalculated the pectin and it didn't set up so we put it all back in the pot and added the correct amount, put it back into jars and it was a little firmer but it never did set as well as it should have.

If it doesn't work/set properly you could freeze it and use it as topping for pancakes or ice-cream.

Good Luck

Answer 3

How to Fix (or Remake) Jam or Jelly That Turns Out Too Soft or Runny
http://www.pickyourown.org/how_to_fix_runny_jam.htm

Answer 4

Same thing happened to me. I guess it doesnt take well.

Recook it, add more gelatin, and cool it again. It'll work out fine.