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
Place the quartered apples in cold water.
Make the syrup
Make a syrup with ½ lb of sugar for every 1 lb of fruit and boil until clear.
When the syrup is half boiled, add 1 lemon for every 3 lbs of fruit.
Make the jelly
For the jelly, use 1 lb of sugar for every 1 pint of juice and boil until clear.
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
- Bell flower apples
- Provide the fruit, pectin and tart flavour that set the jelly.
- Sugar
- Sweetens the jelly and helps it set by binding water and firming the gel.
- Lemon
- Adds acidity that brightens flavour and helps pectin set.
The step that matters
Boiling until clear. Boiling the syrup and juice until clear concentrates sugar and pectin enough to set. Under-boiling leaves a runny jelly, while over-boiling can darken the colour and dull the flavour.
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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