Making a batch of blackberry jam is a wonderful way to bottle the last ... indicating that most of the water from the fruit has evaporated. If you don’t have a sugar thermometer, you can test ...

I developed this blackberry jam from a recipe for raspberry preserve that I already had. The fruits contain similar amounts of natural pectin and so need the same amount of help to thicken. You can ...

Blackberries - of which there are more than 2,000 varieties - can be gathered as soon as they ripen from red fruit into dark ... into excellent jelly or jam. Wild blackberries are as good as ...