Why it works: Orange and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓
Hartshorn Jelly
Ingredients
Directions
Make the jelly
Boil hartshorn shavings in water until one third of the water evaporates.
Strain the mixture and let it cool.
Melt the cooled mixture, add orange and lemon peel for color, and skim well.
Stir in wine, lemon juice, and sugar; adjust sweetness to taste.
Whisk the egg whites and add them to the mixture; stir well.
Boil the mixture briefly, then adjust lemon juice to taste.
Clarify and test
Pour the mixture into a jelly bag lined with egg whites and let it hang near a fire to keep warm until it runs clear.
To test if the jelly is ready, take a spoonful and let it cool.
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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Orange + lemontop 1% of all pairsSmell alikestrongCooked together10,634 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Lemon + winetop 13% of all pairsSmell alikelowCooked together6,157 recipes
Shared aroma: decanal (soap, orange peel).
-
Orange + winetop 14% of all pairsSmell alikemoderateCooked together2,046 recipes
Shared aroma: beta-damascenone (apple, rose).
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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).
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
- Hartshorn shavings
- Dissolve into the water and set as the gelling agent that firms the jelly when cooled.
- Whites of eggs
- Bind impurities when boiled so they can be removed, leaving the jelly clear.
- Fine sugar
- Adds sweetness and balances the acidity of the lemon and wine.
- Lemon juice
- Adds acidity that brightens the flavor and balances the sugar.
- Rhenish or white mountain wine
- Adds flavor and acidity to the jelly base.
The step that matters
Clarifying the jelly through the egg-white-lined bag. Egg whites coagulate when heated and trap cloudy particles, so the jelly must be strained slowly and kept warm to run clear rather than cloudy.
“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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