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 ↓
Apple and Quince Marmalade
Ingredients
Directions
Combine fruit pulp, water, and heated sugar in a pot.
Cook over low heat for 15 minutes.
Test the mixture by placing a small amount on a cold saucer; it should not separate.
Proceed as you would for making jelly.
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
- Fruit pulp
- Provides body, flavor, and natural pectin that helps the marmalade thicken and set.
- Sugar
- Sweetens the marmalade and helps it thicken and set as it cooks.
- Lemon juice
- Adds acidity that supports pectin setting and brightens the flavor.
The step that matters
Testing for set. The cold saucer test shows whether the mixture has reached the gel point. Undercooked marmalade stays runny, while overcooked marmalade can turn stiff or sugary. Checking early prevents both problems.
“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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