Strawberry Jam
Ingredients
Directions
Prepare
Cap and crush the strawberries.
In a porcelain-lined kettle, combine the crushed strawberries and any juice.
Cook
Bring to a boil and cook, stirring frequently, for 30 minutes.
Stir in the sugar and cook for an additional 20 minutes.
Jar
Pour into jars and seal.
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
- Strawberries
- Provide the fruit, flavor, and natural pectin and acid that help the jam thicken.
- Sugar
- Sweetens the jam and, with cooking, helps it set and preserves it.
The step that matters
Stir in the sugar and cook for an additional 20 minutes. Sugar must dissolve fully and the mixture must reach a rolling boil so the pectin and acid can gel. Undercooking can leave the jam runny and less shelf-stable.
“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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