Why it works: Lemon and butter are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Lemon Jelly
Ingredients
Directions
Make the lemon base
Grate the zest of the lemons and squeeze the juice.
In a bowl, combine the sugar, butter, and egg yolks; beat until well mixed.
Add the lemon juice and grated zest to the mixture.
Heat the mixture over low heat, stirring until it thickens.
Make the gelatine version
For the gelatine version, soak the gelatine in warm water for 1 hour.
Dissolve the soaked gelatine in 1 quart of boiling water.
Stir in the lemon juice and 1½ cups of sugar until dissolved.
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 + buttertop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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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).
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 yolks
- Thicken the mixture as they set with gentle heat and add richness.
- Butter
- Adds fat for a smooth, rich texture in the curd.
- Gelatine
- Sets the liquid into a firm, wobbly jelly when dissolved and cooled.
- Sugar
- Sweetens and balances the sharp acidity of the lemon juice.
- Lemon juice and zest
- Provides sharp acidity and fragrant lemon aroma.
The step that matters
Heating the egg yolk mixture over low heat. Egg yolks thicken as their proteins set with heat, but too much heat or too fast will scramble them. Gentle, steady stirring over low heat keeps the mixture smooth.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, butter, egg):
- Vanillafits better
- Lemonthe original
- Raisinfits about as well
- Figfits about as well
Fit is the average pairing score against sugar, butter, 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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