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 water.
Clean the lemon rinds and peel off the yellow part thinly.
Make the jelly
Put all ingredients into a bright metal or enamel pan.
Whisk over medium heat until the liquid boils.
Stop whisking and boil for 5 minutes.
Cover and let it settle in a warm place for 3 minutes.
Strain and finish
Pour boiling water through a jelly bag to keep it warm.
Pour the jelly into the bag and change the basin when it runs clear.
Before it sets, add sherry and brandy, straining them through a fine cloth.
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.
- Lemon juice
- Adds sharp acidity that balances the sugar and gives the jelly its flavour.
- Loaf sugar
- Sweetens the jelly and adds body to the syrup.
- Egg whites and shells
- Bind impurities and cloud particles to the surface so they can be strained out, clearing the jelly.
The step that matters
Stop whisking and boil for 5 minutes. Whisking must stop once the liquid boils, because agitation can break up the egg white raft that traps impurities. Steady boiling then lets the egg coagulate and clarify the liquid before straining.
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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