Blackberry Jam
Ingredients
Directions
Prepare
Pick and wash the blackberries.
Mash the blackberries in a bowl.
Make the jam
Add 3 cups of sugar to the mashed blackberries.
Cook the mixture over medium heat for 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, flavour, colour and natural pectin that gives the jam body.
- Sugar
- Sweetens the jam, draws water out of the fruit and helps it thicken and keep.
The step that matters
Cook over medium heat for 30 minutes. As water evaporates, the sugar and fruit concentrate and thicken. Sugar can scorch on the bottom of the pan if the heat is too high. Medium heat lets the jam reduce evenly to a spreadable consistency.
“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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