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 ↓
Crab Apple Jelly
Ingredients
Directions
Prepare
Cut the crab apples into pieces, removing the seeds but not peeling them.
Place the apples in a stone jar and add a good-sized ½ cup of water.
Extract the juice
Set the jar on the back of the stove to boil slowly, covered, all day.
After boiling, place the mixture in a jelly bag and let it drip overnight.
If the apples are dry, add another ½ cup of water.
Make the jelly
Boil 1 pint of juice with 1 pound of sugar for 5 minutes, stirring constantly.
Repeat this process for each pint of juice, adding kindling wood under the kettle as needed.
Use the pulp
For leftover pulp, press it through a coarse strainer, add lemon juice and sugar equal to the pulp amount, and cook to make jam.
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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Crab + lemontop 16% of all pairsSmell alikemoderateCooked together387 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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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).
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Crab + sugartop 19% of all pairsSmell alikemoderateCooked together407 recipes
Shared aroma: hexanal (grass, 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
- Siberian crab apples
- Provide natural pectin and acid, which allow the juice to set into a gel.
- Sugar
- Adds sweetness and, once concentrated by boiling, helps the juice set and keeps the jelly stable.
- Juice of 2 lemons
- Adds acidity that supports pectin setting and brightens the flavor.
The step that matters
Boiling the juice with sugar. Sugar must dissolve fully and the mixture must reach a rolling boil to concentrate and set into a gel. Constant stirring prevents sugar from scorching on the bottom of the pan, which would give the jelly a burnt taste.
Swap the apple
How well each one fits the dish's main ingredients (crab, sugar, lemon):
- Limefits better
- Orangefits better
- Raisinfits better
- Applethe original
Fit is the average pairing score against crab, sugar, lemon. 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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