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 ↓
Orange Jelly
Ingredients
Directions
Make the jelly
Dissolve the gelatine in 2 quarts of water or fruit juices.
Add the grated rind and juice of 4 lemons and 1 lb of granulated sugar.
Mix well and bring to a simmer.
Clarify and strain
Once it coagulates, allow the scum to turn grey for clarification.
Strain through a flannel bag three times before using.
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.
- Granulated sugar
- Adds sweetness and body to the jelly.
- Lemons
- Provide acidity and bright citrus aroma from the rind and juice.
- Eggs
- Whites and shells collect impurities during simmering, clarifying the jelly.
The step that matters
Letting the scum turn grey. The egg whites and shells must coagulate and trap impurities while the liquid simmers. Stirring them back in or letting the mixture boil hard breaks up the raft, leaving the jelly cloudy instead of clear.
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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