Blackberry Jam
Ingredients
Directions
Wash the blackberries thoroughly.
Combine the blackberries and sugar in a pot.
Boil the mixture for 30 to 45 minutes, stirring occasionally.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
What each ingredient does
- Blackberries
- Provide the fruit flavour, colour and bulk that form the body of the jam.
- Sugar
- Sweetens the jam and helps it thicken and set as it cooks down.
The step that matters
Boil the mixture for 30 to 45 minutes, stirring occasionally. Sugar and fruit must cook long enough for the mixture to reach the concentration needed to set. Stirring prevents the sugar and fruit from scorching on the bottom of the pot.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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