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 Jelly
Ingredients
Directions
Prepare the fruit
Pare and slice the apples.
Place the sliced apples in a deep saucepan.
Cover the saucepan with water.
Boil gently until the apples are soft enough to mash.
Strain and sweeten
Strain the mixture through a jelly bag.
For every pint of liquid, add 1 pound of loaf sugar.
Boil the mixture for 10 minutes until it reaches the top.
Pour
Pour into a mold, with or without sliced lemon peel.
Make only 1 quart at a time.
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
- Apples
- Supply pectin and acid, which help the strained juice set into a jelly.
- Loaf sugar
- Sweetens the jelly and helps it set firm and hold its shape.
The step that matters
Boiling the sweetened liquid. Sugar, pectin and acid must be concentrated by boiling to reach the gel point. Too little boiling leaves the jelly runny, while too much can make it stiff or cloudy.
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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