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 Jelly
Ingredients
Directions
Cook the apples
Peel the apples.
Slice the peeled apples.
Put the sliced apples into a saucepan with the lemon rind, sugar, water, and lemon juice.
Simmer the mixture until the apples are tender.
Rub the cooked mixture through a fine sieve.
Add gelatine and set
Melt the gelatin in ¼ cup of water.
Strain the melted gelatin into the apple mixture.
Set the mixture in dariole moulds that have been rinsed with cold water.
Turn out
When the mixture is firm, dip the moulds into warm water.
Turn the moulds onto a dish.
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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Lemon + sugartop 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
- Provides the main fruit flavour and body, with natural pectin that helps the jelly hold together.
- Sugar
- Adds sweetness and balances the tartness of the lemon and apples.
- Lemon juice
- Adds acidity that brightens the flavour and sharpens the fruit taste.
- Gelatine
- Sets the strained liquid into a firm, sliceable jelly as it cools.
The step that matters
Dipping the moulds to turn out. A brief dip in warm water loosens the jelly from the mould walls without melting its surface. Leaving the moulds too long in warm water softens the outer layer, so the jelly may slump or lose its shape when turned onto the dish.
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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