This is so good. Yes I agreed the mount the pectin is not right. I have to redo mine also. I used 3/4 amount of sugar. I done a large batch. Got 18 pints. Thank for posting it.
I also had to use an entire pkg of sure jell, and 2 extra cups of sugar, skipped the lemon juice as mine were tart. BUT it is very nice jam!
I think the amount of pectin is not right. I made this recipe and it never set. I redid the batch as the pectin sheet says and had to add the entire package. Maybe it should have been 3 Tbs not 3 tps. Could be sweeter. I also had to add sugar in redoing the pectin of 1 1/2 Tbs to each cup and it still was not sweet.
Needed to use up some prune plums, quite good but very tart, I think it will be very good to use in savoury dishes. I used splenda instead of sugar and a wee bit more pectin. Thanks for posting.