Blackberry Jam
Ingredients
Directions
Prepare
Take the berries after the juice has been removed for jelly.
Run the berries through a flour sifter.
Add 2 cups of sugar to 3 cups of the juice.
Cook
Cook fast for 15 minutes, stirring all the time.
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, juice, and body of the jam.
- Sugar
- Sweetens the jam and helps it set by binding water as it thickens while cooking.
The step that matters
Cook fast for 15 minutes, stirring all the time. Constant stirring stops the sugar-rich fruit from sticking and scorching on the base of the pan. Fast cooking concentrates the mixture quickly so it reaches a thick set without overcooking and darkening the flavour.
“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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