Will Unset Jam Keep?

Here's what you can do to salvage that jam. If you don't want to invest any additional work in that jam, all you have to do is change expectations. If it's just sort of runny, call it preserves. ... For every 4 cups of jam that needs to be remade, whisk together 1/4 cup sugar and 1 tablespoon powdered pectin.

What can I do with unset jam?

A runny batch will just happen occasionally. If, after waiting, you find the jam is still too loose for your liking, empty the jars back into a wide pot and cook again. You can simply reduce the jam to your liking, or you can also add a small amount of commercial pectin to help the process.

Can you Reboil unset jam?

Reboiling runny jam or jelly is actually straightforward and easy to do. To reboil jam you first add more sugar and pectin in order for it to set. Typically, you want to add 1/2 cup of sugar mixed with a half box of pectin (or 2 tablespoons of bulk pectin) for six to eight jars of jam or jelly.