Why it works: Milk and corn are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 6,955 recipes. Both carry hexanal, which smells green, grassy. The science ↓
Lemon Jelly
Ingredients
Directions
Make the jelly
Pour boiling water over gelatine and stir until dissolved.
Add lemon juice and sugar when the mixture is nearly cold, then strain it.
Beat the egg whites until stiff and fold them into the mixture.
Pour the mixture into a mold and let it set.
Make the custard and serve
For the custard, cook egg yolks, milk, and corn starch until thick like soft custard.
Once the jelly is set, pour the custard over it.
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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Milk + corntop 10% of all pairsSmell alikemoderateCooked together6,955 recipes
Shared aroma: hexanal (green, grassy).
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Lemon + corntop 13% of all pairsSmell alikemoderateCooked together1,927 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + milktop 15% of all pairsSmell alikemoderateCooked together19,053 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Egg + milktop 18% of all pairsSmell alikemoderateCooked together88,785 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 whites
- Whipped to stiffness, they add lightness and an airy, foamy texture to the jelly.
- Sugar
- Sweetens the jelly and balances the tartness of the lemon juice.
- Lemon juice
- Adds acidity and bright citrus flavour to the jelly.
- Milk
- Forms the base of the custard, giving it richness and a smooth body.
- Corn starch
- Thickens the custard as it cooks, giving it a soft, set texture.
The step that matters
Folding in the egg whites. Egg whites must be beaten until stiff and folded in gently so the air is kept; stirring vigorously deflates the foam and leaves the jelly dense. Adding them to a mixture that is too warm can also cause them to collapse.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg, milk, corn):
- Vanillafits better
- Coconutfits better
- Figfits better
- Lemonthe original
Fit is the average pairing score against sugar, egg, milk, corn. 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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