Blackberry Jam
Ingredients
Directions
Prepare
Gather the blackberries in dry weather.
Combine the blackberries and brown sugar in a pot.
Cook and preserve
Boil gently for 1 hour, stirring and mashing until the blackberries are soft.
Preserve the jam as you would 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 acidity that form the jam's body and flavor.
- Brown sugar
- Adds sweetness and helps thicken the jam as it cooks down.
The step that matters
Boiling until the blackberries are soft. Cooking gently while stirring and mashing breaks down the fruit so it releases its pectin. Too little cooking leaves the jam runny, while overcooking can scorch the sugar and dull the flavor.
“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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