Blackberry Jam
Ingredients
Directions
Cook the jam
Stew the blackberries in a porcelain kettle.
Add the sugar and mash everything together with a strong wooden spoon while on the fire.
Boil for 15 minutes, stirring well.
Jar and cool
Fill small jars or glasses and set aside to cool.
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, body, and natural pectin and acid that help the jam thicken and set.
- Sugar
- Adds sweetness, thickens the fruit as it cooks, and helps the jam set and keep.
The step that matters
Boil for 15 minutes, stirring well. Sugar-rich jam sticks and scorches on the bottom of the pan easily, and the mixture must reach a full boil for the pectin and sugar to set properly. Constant stirring prevents scorching and helps the jam cook 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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