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 ...

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 ...

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 ...

Very tart fruit (such as sour cherries or some plums ... peach preserves, wild blackberry jam. For most people, home canning had less to do with absolute necessity than with taste and tradition.