Blackberry Jam
Ingredients
Directions
Prepare
Gather blackberries in dry weather.
Combine blackberries and brown sugar in a pot.
Cook and preserve
Boil gently for 1 hour, stirring and mashing until soft.
Preserve like any other jam.
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 natural acid that give the jam its body and flavor.
- Brown sugar
- Sweetens the jam and helps thicken it as the mixture cooks down.
The step that matters
Boil gently for 1 hour, stirring and mashing until soft. Gentle boiling and frequent stirring reduce the liquid slowly while keeping the sugar from scorching on the bottom of the pot. Mashing breaks the fruit down so it can thicken evenly.
“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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