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
Prepare the juice
Core and cut the apples into quarters.
Boil the apples with the lemon rind until tender.
Drain the mixture and strain the juice through a jelly bag.
Make the jelly
Add ½ pint of sugar and ½ ounce of soaked gelatin to each pint of juice.
Simmer the gelatin in ½ pint of water until dissolved.
Boil all together slowly for 15 minutes.
Set and serve
Strain into molds and let cool.
Turn out when cold and serve with whipped cream or custard.
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
- Provide the juice and natural pectin that helps the jelly set.
- Gelatine
- Sets the juice into a firm, sliceable jelly.
- Sugar
- Adds sweetness and helps the jelly hold its set.
- Lemon rind
- Adds aroma and a bright, slightly sharp flavour.
The step that matters
Dissolve the gelatine fully before combining. Gelatine only sets when fully dissolved and evenly mixed. Undissolved specks leave a grainy texture and can weaken the set, so simmer until no granules remain before adding it to the juice.
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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