Blackbebrt Jam
Ingredients
Directions
Prepare
Gather blackberries in dry weather and weigh them.
Cook the jam
Combine the blackberries and sugar in a pot.
Mash the mixture well together.
Cook until the mixture is thick and free of syrup.
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 flavor, pectin, and bulk of the jam.
- Sugar
- Sweetens the jam and helps it thicken and set as it cooks.
The step that matters
Cook until thick and free of syrup. Cooking drives off water and concentrates the sugar and fruit pectin. Stopping too early leaves a runny jam that will not set, while cooking too long can scorch the sugar and make it bitter.
“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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