Spent a lot of today making jam with a friend. Was a lot of fun, we ate a lot of jam off giant wooden spoons and ended up with 5 batches of jam.
The first and second batches were made with certo pectin. The recipe called for 7 cups sugar to approx. 4 cups crushed berries. These batches turned out great but were sooooo sweet.
For the next batches we switched to Pomona's natural pectin. We used 2 cups sugar with the first batch and only 1 cup of sugar with the next two batches. They taste amazing.
But then I called my mum who told me that there likely isn't enough sugar in those batches to stop them from going mouldy.