Why it works: Lemon and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Apple Jelly
Ingredients
Directions
Make the jelly
Boil the peeled apples with water and isinglass until the apples are reduced to a pulp.
Strain the mixture to remove solids.
Add lemon juice, grated lemon rind, and loaf sugar to the strained liquid. Boil together for 20 minutes.
Strain again.
Serve
Serve as a sweetener for apple pies.
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 + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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 (in the method)
- Provide the pectin and flavor that form the base of the jelly.
- Isinglass
- Gelatin-like setting agent that firms the strained liquid into a jelly.
- Loaf sugar
- Adds sweetness and helps the jelly set when boiled.
- Lemon juice
- Adds acidity that brightens flavor and supports setting.
The step that matters
Boiling the apples to a pulp. Apples must be cooked until fully softened so their pectin and juice are released; under-cooked apples yield weak flavor and poor extraction.
“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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