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 ↓
Apples in Jelly
Ingredients
Directions
Prepare the apples
Pare and core the small apples.
Place the apples and sliced lemons in water to cover and boil slowly until tender.
Remove the apples carefully without breaking them.
Make the syrup
Make a syrup with ½ pound of sugar for each pound of apples.
Add the lemon slices and apples to the syrup and boil very slowly until the apples are clear.
Set and serve
Place the apples in a deep dish.
Add 1 ounce of dissolved gelatin to the syrup, boil for 2 minutes, and pour over the apples.
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
- Form the main body of the dish and turn clear and tender as they cook in the syrup.
- Sugar
- Sweetens the dish and, as it thickens the syrup, helps the apples turn clear.
- Gelatine
- Sets the syrup so it holds a firm, jellied texture around the apples.
- Lemons
- Add acidity and aroma that brighten the sweet syrup.
The step that matters
Boil the apples slowly in the syrup until clear. Slow simmering keeps the apples whole while sugar gradually replaces water in their cells, making them clear. Fast boiling would break the fruit apart and cloud the syrup.
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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