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
The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.
Prepare the jelly
Soak the gelatine in cold water for 5 minutes.
In a bowl, combine the lemon juice and soft sugar until dissolved.
Add the soaked gelatine to the boiling water and stir until fully dissolved.
Mix the gelatine mixture with the lemon juice mixture.
Whip the egg white until frothy and add it along with the shell to the mixture.
Set
Let the mixture cool, then pour it into a mold and refrigerate until set.
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
- Gelatine
- Sets the liquid into a firm, wobbly jelly as it cools and chills.
- Lemon juice
- Provides the sharp acidity that gives the jelly its bright flavour.
- Soft sugar
- Sweetens the jelly and balances the sourness of the lemon juice.
- Egg white
- Its proteins trap impurities and, with the shell, help clear the jelly.
The step that matters
Let the mixture cool before pouring into the mold. Gelatine sets as it cools, so the mixture must be cooled to avoid a weak or uneven set and to keep the clarifying egg white and shell from being disturbed.
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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