Usually cherry jam is made with morello cherries, which have a reasonable amount of pectin. Ripe dessert (sweet) cherries are low in pectin and it can be difficult to get a good set.
If it fails the pectin test, add 3 fl oz of pectin stock with the sugar.
Ingredients for Cherry Jam:
- 2½ lbs (1.125 kgs) sugar
- 4 lbs (1.8 kg) cherries
- Juice of 2 lemons
Method for Cherry Jam:
- Wash the cherries and remove the stones.
- Put into a pan with the lemon juice and simmer gently until the fruit is soft.
- Test for pectin.
- Add the sugar, stirring until it has dissolved.
- Bring to the boil and boil rapidly for about 10 minutes until the jam sets when tested.
- Remove the scum
- Pot and seal at once.
Makes around 5 lbs (2.25 kgs) of jam.
General Information on Jam Making