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 ↓
Lemon Jelly
Ingredients
Directions
Prepare
Soak the gelatine in the cold water for 2 hours.
Cut a few strips of lemon rind and soak them with the gelatine.
Make the jelly
Pour the boiling water over the gelatine, then add sugar, lemon juice, and slightly beaten egg white with the crushed shell.
Boil briskly for 3 minutes, then set aside for 5 minutes.
Skim the mixture and pass it through a jelly bag until clear.
Set and serve
Rinse a large mold with cold water, fill it with the jelly, and set it in a cold place to harden.
Turn out onto a cut paper and serve with or without Custard Sauce.
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).
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Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 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
- Gelatine
- Sets the liquid into a firm, wobbly jelly as it cools.
- Egg white and shell
- Binds fine particles and clarifies the liquid when it is passed through the jelly bag.
- Lemon juice
- Provides the sharp, acidic flavour that balances the sugar.
- Sugar
- Adds sweetness and contributes to the jelly's body and set.
The step that matters
Passing the mixture through a jelly bag until clear. Skimming and straining remove the coagulated egg white and solids. Rushing this leaves the jelly cloudy and less attractive, though it still sets.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against egg, 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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