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 Preserves
Ingredients
Directions
Prepare the syrup
Peel and core the apples from the blossom end, leaving the stem.
In a pot, combine 1½ cups of sugar with 1 cup of water to make syrup.
Simmer the syrup gently.
Cook and jar the apples
Drop a few apples into the syrup and cook until tender.
Skim the apples out into jars kept in hot water.
Continue adding more apples until the jars are two-thirds full.
Fill the jars with hot syrup and seal like canned fruit.
Flavor with lemon slices if desired.
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
- Tart apples
- Provide the fruit body and a tart flavor that balances the sweet syrup.
- Sugar
- Sweetens the syrup and helps preserve the fruit's texture and shape.
- Water
- Dissolves the sugar to form the syrup that surrounds and cooks the apples.
The step that matters
Cooking the apples until tender in the syrup. Apples cooked too briefly stay firm and may not soften evenly, while overcooking makes them fall apart. Cooking gently in simmering syrup lets sugar slowly penetrate the fruit, helping it hold its shape and texture in the jar.
Swap the lemon
The recipe marks lemon as optional. 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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