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Dessert

Orange Marmalade

A preserved citrus spread made from oranges, lemons, water, and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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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

  1. Slice the oranges and lemons finely and remove the seeds.

  2. Soak the sliced fruit in the water for 24 hours.

Cook and jar

  1. Boil the mixture for 1 hour.

  2. Add the sugar and boil for another hour, or until it reaches a jelly‑like consistency.

  3. Pour into jars and cover.

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
Provide the fruit bulk and peel, which contains pectin that helps the marmalade set.
Lemons
Add acidity and extra pectin, which help the mixture gel and brighten the flavour.
Sugar
Adds sweetness and, at high concentration, helps the pectin form a firm gel.

The step that matters

Adding the sugar and boiling until jelly-like. Sugar, pectin and acid must reach the right concentration to set. Stopping too early leaves the marmalade runny, while boiling too long can make it stiff and dark.

“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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