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
Make the jelly
Combine water, lemon rind, lemon juice, gelatine, sugar, egg shells, and beaten egg whites in a saucepan.
Bring to a boil while whisking, then simmer for about 10 minutes.
Strain the mixture into a mold.
Set
Chill until set, about 1 hour.
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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Sugar + eggtop 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
- Egg whites
- Coagulate as they heat, clarifying the liquid so it sets clear.
- Leaf gelatine
- Sets the liquid into a firm, sliceable jelly as it cools.
- Lemon juice
- Provides the sharp acidity that defines the jelly's flavor.
- Loaf sugar
- Sweetens the jelly and balances the lemon's sourness.
The step that matters
Bring to a boil while whisking. Whisking keeps the egg whites from clumping on the base of the pan. As they heat, the whites coagulate and trap impurities, which is what clarifies the liquid. Stopping the whisk too early can leave cloudiness.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against sugar, egg. 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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