Why it works: Sugar and lemon 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
Make the syrup
Combine 1½ pints clarified sugar with a little water in a pot and bring to a boil.
Skim the surface well, then add 2 ounces clarified isinglass and thinly cut lemon rind.
Boil until the mixture is well combined.
Finish and set
Squeeze the juice of 6 lemons through a sieve into a basin.
Combine the sugar and isinglass mixture with the lemon juice.
Pour into a mold and let it set.
Once set, turn out and garnish with dried jellies.
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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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
Sugar and lemon 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
- Clarified sugar
- Provides sweetness and the body of the syrup that the jelly is built on.
- Clarified isinglass
- Gelatin-like protein that sets the liquid into a firm, sliceable jelly when cooled.
- Lemon juice
- Adds sharp acidity that balances the sweetness and gives the jelly its flavor.
- Lemon rind
- Contributes aromatic lemon oils that scent the jelly.
The step that matters
Skim the surface well before adding isinglass. Skimming removes foam and impurities that would cloud the jelly and spoil its clarity. Isinglass is added only after the syrup is clean so it sets evenly.
“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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