Now about that sour/sweet balance. No Sugar Pectin is used here because it allows you to significantly reduce the amount of sugar used. This is a flavor choice, rather than caloric or health-realted. I don’t go the full no-sugar/artificial sweetener route that this type of pectin allows. Use the instructions included with pectin to customize the recipe to the amount of fruit you have.
The measurements here produce a just-set gel. It will be firm when chilled but thick and runny at room temp. As the jam came to a boil, it gelled while still boiling, hence the addition of water. Do a check when the jam comes to the boil. The smear-on-a-chilled-plate-in-the-freezer trick works well.
SOUR CHERRY JAM
Recipe
1 lb. sour cherries (should = 2 cups)
1 c. sugar
1 T. Ball No Sugar Needed Pectin
Water as needed
Cut the cherries in half, remove pits. Working over a bowl or plate to collect any errant juices, cut the cherries in half and discard the pits.
Mix 1 T. No Sugar Needed Pectin with 1/4 c. of cherry juice. In a heavy pot combine the pectin/juice mix with the all the rest of the cherries and juice. Bring to a boil, stirring. When boiling, add the sugar, stirring well to mix.
When the jam comes to a full boil check the consistency. If the jam seems overly thick while still boiling, add a little water and bring back to the boil. In this recipe I added 1/3 c. water, which produced a very light set. Half of that, 3 or 4 Tablespooons of water, will make a firmer set.
One pound of cherries makes three half-pint jars of jam. You can put them up using sterilized jars and lids with a boiling water bath for 5 minutes. However this is such a good one chances are it will be devoured soon enough, so fridge storage would be fine.