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Dessert

Orange Marmalade

A preserved fruit spread made from oranges, lemon, water, and sugar.

From an old cookbook · modernised transcription
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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 the fruit

  1. Slice the oranges and lemon.

  2. Cover with 4 pints of cold water and let stand overnight.

Cook

  1. Boil the fruit until tender the next day.

  2. Pour back into a bowl and let stand overnight.

  3. For each pound of fruit, add 1½ pounds of sugar.

  4. Cook slowly for 1 to 2 hours.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Orange + lemontop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  3. Orange + sugartop 20% of all pairs
    Smell alikelow
    Cooked 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 bitter peel and pectin that give marmalade its characteristic flavour and set.
Lemon
Adds acidity and extra pectin, helping the marmalade brighten and set.
Sugar
Sweetens the marmalade and, with the fruit's acid and pectin, helps it gel as it cooks.

The step that matters

Cook slowly for 1 to 2 hours. Sugar must dissolve fully and the mixture must reach a gel point. Cooking too hard can scorch the sugar or burn the peel, while cooking too gently may leave 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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