Why it works: Lemon and apple 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 ↓
Preserved Pippins
Ingredients
Directions
Prepare the apples
Pare and core the pippins.
Place them in a preserving kettle with lemon peel and apple parings.
Add a little water.
Cover closely.
Boil until tender, being careful not to burn them.
Remove the apples.
Spread them on a large dish to cool.
Make the syrup
Pour the liquid into a bag and strain it well.
Return the strained juice to the kettle.
Add 1 pound of loaf sugar for each pint of juice and lemon juice to taste.
Boil for 5 minutes, skimming well.
Finish and seal
Add the whole apples.
Boil slowly for half an hour until soft and clear.
Transfer the apples and juice into jars.
Let them cool completely.
Seal with brandy paper.
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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Lemon + appletop 14% of all pairsSmell alikemoderateCooked together7,551 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Apple + sugartop 18% of all pairsSmell alikelowCooked together16,478 recipes
Shared aroma: beta-damascenone (apple, rose).
-
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
- Pippins
- Provide the fruit that becomes tender and holds its shape when cooked in the syrup.
- Loaf sugar
- Sweetens the juice and, as it dissolves and reduces, thickens it and helps preserve the fruit.
- Lemon juice
- Adds acidity that brightens the flavour and helps the syrup set clear.
- Apple parings
- Add extra pectin and apple flavour to the cooking liquid, which is strained away later.
The step that matters
Boil the apples until tender without burning them. Gentle, covered boiling with enough liquid softens the fruit evenly. Scorching sugars and proteins on the kettle base gives a bitter, dark taste that spreads into 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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