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 Jelly
Ingredients
Directions
Prepare
Cut the oranges into quarters, removing all seeds.
Separate the rind and steep it in water for 24 hours to reduce bitterness.
Cook and set
Boil the peel with the oranges until tender.
Run the mixture through a jelly bag.
For every pint of juice, add 1 pound of sugar and boil for at least 30 minutes.
Optionally, add cut lemons with the oranges for extra flavor.
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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Sugar + lemontop 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).
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
- Seville oranges
- Provide pectin and acid, which help the marmalade gel and balance the sweetness.
- Sugar
- Sweetens the marmalade and, when boiled down, helps it set into a firm gel.
The step that matters
Boil with the sugar for at least 30 minutes. The mixture must reach a high sugar concentration and the right acidity so pectin can form a gel. Boiling too briefly leaves the marmalade runny and unset.
Swap the lemon
The recipe marks lemon as optional. How well each one fits the dish's main ingredients (orange, sugar):
- Vanillafits better
- Lemonthe original
- Figfits less well
- Pineapplefits less well
Fit is the average pairing score against orange, sugar. Candidates are from the same food group and used in at least 100 recipes.
“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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