Why it works: Quince and apple work together. They rank in the top 1% of all ingredient pairs, and cooks put them together in 506 recipes. Both carry ethyl isobutyrate, which smells fruity, ethereal. The science ↓
Preserved Quinces
Ingredients
Directions
Prepare the quinces
Pare, core, and quarter the quinces, then place them in cold water.
Boil the quinces in just enough water to cover them until tender.
Boil the parings, seeds, and cores in enough water to cover them.
Remove the quinces with a perforated skimmer and let them cool on dishes.
Strain the juice from the quinces and parings through a fine sieve.
Make the syrup
For every pint of juice, add a pound of sugar and boil, skimming carefully.
Add the quinces to the syrup and boil for an additional 20 minutes.
Remove the fruit.
Jar and seal
Fill jars, pouring the boiling syrup over them.
Seal the jars.
Boil the remaining syrup until it thickens to a jelly.
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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Quince + appletop 1% of all pairsSmell alikemoderateCooked together506 recipes
Shared aroma: ethyl isobutyrate (fruity, ethereal).
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Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
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Quince + sugartop 21% of all pairsSmell alikemoderateCooked together1,444 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
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
- Fine yellow quinces
- Provide the main fruit, whose pectin and firm flesh set the preserve when cooked.
- Sweet apples
- Add extra pectin from their parings and cores to help the juice thicken into jelly.
- Sugar
- Sweetens the juice and, with boiling, helps preserve the fruit and set the syrup.
The step that matters
Boil the remaining syrup until it thickens to a jelly. Syrup must reach the gel point, where sugar and pectin set together. Undercooked syrup stays runny, while overcooking can turn it stiff or sugary.
Swap the quince
How well each one fits the dish's main ingredients (apple, sugar):
- Pearfits better
- Vanillafits about as well
- Apricotfits about as well
- Quincethe 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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