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 pot, combine 1½ pints of clarified sugar with a little water and heat until boiling.
Skim the surface to remove impurities.
Flavour and combine
Add 2 ounces of clarified isinglass and thinly cut lemon rind; boil until dissolved.
Squeeze the juice of 6 lemons through a sieve into a basin.
Combine the sugar and isinglass mixture with the lemon juice.
Set and serve
Pour the mixture into a mold and refrigerate until set.
Once set, turn out the jelly and garnish with dried cherries.
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
- Isinglass
- Gelatin-like protein that dissolves when boiled and sets the liquid into a firm jelly on cooling.
- Clarified sugar
- Provides sweetness and body to the syrup, balancing the sharpness of the lemon juice.
- Lemon juice
- Supplies acidity and bright flavour that contrasts with the sweet syrup.
- Lemon rind
- Adds aromatic oils that scent the jelly with lemon flavour.
The step that matters
Boil the isinglass until fully dissolved. Isinglass must dissolve completely in the hot syrup; undissolved pieces will not set evenly and can leave a grainy or weak jelly. Boiling also helps the setting protein disperse through the liquid before it cools.
“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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