Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Apple Marmalade
Ingredients
Directions
Prepare
Pare, core, and slice the apples thinly.
In a kettle, combine sugar and water; heat until dissolved.
Cook
Add the apples to the kettle.
For every 2 pounds of apples, add the grated rind and juice of 1 lemon.
Simmer gently until the apples look clear, stirring frequently to prevent scorching.
Jar
Transfer to glass 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
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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Apple + lemontop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Apple and sugar barely smell alike, yet cooks put them together in 16,478 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
- Apples
- Provide the bulk and pectin-rich body that sets the marmalade as it cooks.
- Sugar
- Sweetens the fruit and helps thicken and preserve the mixture as it cooks down.
- Lemon
- Adds acidity and aroma, and its rind contributes natural pectin to help setting.
The step that matters
Simmer gently while stirring. Sugar-rich mixtures scorch easily on the bottom of the pan. Frequent stirring and gentle heat keep the fruit from burning while it slowly thickens.
Swap the lemon
How well each one fits the dish's main ingredients (apple, sugar):
- Pearfits better
- Vanillafits better
- Apricotfits better
- Lemonthe original
Fit is the average pairing score against apple, sugar. Candidates are from the same food group and used in at least 100 recipes.
“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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