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 pints of clarified sugar with a little water.
Heat until boiling and skim off any foam.
Add 2 ounces of clarified isinglass and thinly sliced lemon peel.
Boil until the isinglass dissolves.
Add the juice and set
Squeeze the juice of 6 lemons into a basin and strain it.
Combine the sugar and isinglass mixture with the lemon juice.
Pour into a mold and refrigerate until set.
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
- Isinglass
- Gelatin-like protein that sets the liquid into a firm, sliceable jelly when chilled.
- Sugar
- Adds sweetness and body to the syrup, balancing the sharpness of the lemon.
- Lemon juice
- Supplies acidity and bright flavor that cuts through the sweetness.
- Lemon peel
- Adds aromatic oils that scent the syrup with lemon flavor.
The step that matters
Boil until the isinglass dissolves. Isinglass must be fully dissolved into the hot syrup before the juice is added and the mixture chilled. Undissolved pieces will not set evenly, leaving a grainy or weak jelly.
“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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