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 ↓
Orange Marmalade
Ingredients
Directions
Prepare
Slice the oranges and lemons thinly.
Combine the sliced fruit with 1½ pints of cold water in a pot.
Soak and boil
Boil for 30 minutes.
Let the mixture stand overnight.
Add sugar and finish
In the morning, add 1½ lbs of sugar for each pint of mixture.
Boil for an additional 40 minutes.
Pour the marmalade into glasses.
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 + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Orange + sugartop 20% of all pairsSmell alikelowCooked together19,212 recipes
Shared aroma: beta-damascenone (apple, rose).
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
- Oranges
- Supply the peel flavour and pectin that help the marmalade set.
- Lemons
- Add acidity and extra pectin, which support setting and brightness.
- Sugar
- Sweetens the marmalade and, with fruit acid and pectin, helps it gel.
The step that matters
Boil for an additional 40 minutes after adding the sugar. Pectin, sugar and acid form a gel only when the mixture stays at a full boil long enough. Boiling too briefly leaves the marmalade runny.
“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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