Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Blackberry Jam
Ingredients
Directions
Prepare
Combine blackberries and sugar in a pot.
Add lemon juice if using 12 pounds of fruit.
Cook
Boil for 45 minutes.
Alternatively, boil the fruit first.
Stir in sugar with a bone or silver spoon for 15 minutes.
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
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and lemon barely smell alike, yet cooks put them together in 53,532 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Blackberries
- Provide the fruit flavor, bulk, and natural pectin that helps the jam set.
- Moist sugar
- Adds sweetness and binds water, helping the jam thicken and keep.
- Lemon juice
- Adds acidity that helps pectin set and brightens the fruit flavor.
The step that matters
Stirring the sugar into the fruit while it cooks. Sugar sinks and can scorch on the bottom of the pot if not stirred. Stirring keeps heat even and the sugar dissolved, so the jam cooks evenly and reaches a proper set.
“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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