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
In a saucepan, combine 1½ cups of clarified sugar with a little water and heat until boiling. Skim off any foam that forms on the surface.
Add 2 ounces of clarified isinglass and the thinly cut lemon rind, and let it boil.
Assemble and set
Squeeze the juice of 6 lemons through a sieve into a basin.
Combine the sugar and isinglass mixture with the lemon juice and pour into a mold.
Once set, turn out the jelly 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 isinglass
- Gelatin-like setting agent that firms the liquid into a sliceable jelly as it cools.
- Clarified sugar
- Adds sweetness and body to the syrup, balancing the sharpness of the lemon juice.
- Lemon juice
- Provides the acidity and bright lemon flavor that defines the jelly.
- Lemon rind
- Contributes aromatic lemon oil and flavor to the boiled syrup.
The step that matters
Skimming the foam before adding isinglass. Foam that forms on boiling sugar syrup contains impurities that would cloud the jelly and spoil its clarity. Removing it keeps the finished jelly clear and clean-tasting.
“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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