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 ↓
Watermel or Muskmelon Marmalade
Ingredients
Directions
Prepare the rind
Weigh the soaked watermelon rind and parboil it.
Boil the orange and lemon peelings in water, changing the water three times until very soft.
Make the marmalade
Make a thin syrup with the sugar and add the parboiled rind.
Boil until the rind breaks into pieces.
Stir constantly with a spatula until thick.
Jar
Transfer to wide-mouthed glass jars.
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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Sugar + orangetop 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
- Watermelon rind
- Forms the bulk of the marmalade and gives it its body as it breaks down when boiled.
- Sugar
- Sweetens the marmalade and, as it thickens in the syrup, helps set it into a spreadable texture.
- Orange peelings
- Adds bitter aromatic flavour and natural pectin that helps the marmalade thicken.
- Lemon peelings
- Adds acidity and aroma, and natural pectin that helps the marmalade set.
The step that matters
Boil the citrus peelings until very soft, changing the water three times. Citrus peel is bitter and tough. Repeated changes of water draw out bitterness, and full softening lets the strips become tender enough to eat in the finished marmalade.
“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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