For Red and Black Raspberries and Blackberries
fills 2 cansIngredients
Directions
Cook
Combine the fruit, sugar, and water in a pot.
Heat on the stove until the mixture is well combined.
Boil for no more than 5 minutes.
Can
Can the mixture while hot. This quantity fills 2 cans.
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
- Fruit (raspberries or blackberries)
- Provides the main flavor, body, and natural pectin that help the jam thicken and set.
- Sugar
- Sweetens the jam and helps it set and keep well.
The step that matters
Boil for no more than 5 minutes. Boiling too long drives off water and overconcentrates the sugar and pectin, which can make the jam stiff and dull the fresh berry 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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