Blackberry Jam
Ingredients
Directions
Prepare
Remove any stems, trash, or leaves from the blackberries.
Weigh the berries and place them in a large kettle with the water.
Cook the jam
Cook the berries over medium heat, stirring frequently, until they reduce to a solid mass.
Add the brown sugar and cook for an additional 30 minutes.
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, pectin and flavour that form the jam's body and taste.
- Brown sugar
- Sweetens the jam and helps it thicken as the mixture reduces.
The step that matters
Cooking the berries until they reduce to a solid mass. Cooking the fruit down drives off water and concentrates sugars and pectin so the jam can set. Stirring frequently prevents the berries from scorching on the bottom of the kettle.
“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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