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 ↓
Marmalade, Orange
Ingredients
Directions
Prepare the fruit
Divide the rinds of the oranges into quarters and remove them carefully.
Place the rinds in a preserving pan and cover with cold water.
Boil gently until tender.
Divide the fruit into sections and scrape out the pulp.
Soak the pips and fibrous skin in cold water.
Once the rinds are tender, drain and shred them finely.
Strain 2 pints of the liquid from boiling the rinds.
Add the soaking water from the pips and skins.
Make the marmalade
In a preserving pan, combine the sugar and strained water.
Boil to a syrup.
Add the shredded rinds and pulp to the syrup.
Boil gently until the marmalade jellies on a cold plate.
Pot and seal
Pour the marmalade into pots.
Cover with paper brushed with egg white.
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).
-
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
- Seville oranges
- Their rinds and pips supply the bitterness and natural pectin that help the marmalade set.
- Sweet oranges
- Add sweetness and body to the fruit, balancing the sharp bitterness of the Seville oranges.
- Lemons
- Add acidity, which helps the pectin set and brightens the flavour.
- Preserving sugar
- Sweetens the marmalade and, with the acid and pectin, helps it set and keep.
The step that matters
Boil until the marmalade jellies on a cold plate. Setting depends on sugar, acid and pectin reaching the right concentration. Undercooked marmalade stays runny, while overcooking makes it stiff and dark. A cold plate test shows when it has reached a set point.
“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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