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Royal Marmalade

A marmalade made from Seville oranges, lemon juice and rind, sugar, and water.

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 ↓

Royal Marmalade

Ingredients

Directions

Prepare and soak

  1. Cut each orange into eight quarters and slice them very thin.

  2. Remove the seeds and place them in a basin, covering with water.

  3. For every pound of fruit, add 3 pints of cold water and let it stand for 24 hours.

Boil and rest

  1. Boil the mixture until the fruit is tender, adding the juice from the seeds.

  2. Let it stand until the next day.

Make the marmalade

  1. For every pound of boiled fruit, add 1.5 pounds of sugar and the juice and rind of 2 lemons.

  2. Boil while stirring constantly until the syrup jellies.

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. Sugar + lemontop 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).

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 the bitter peel and natural pectin that help the marmalade set.
Sugar
Adds sweetness and, once concentrated by boiling, helps the syrup set into a jelly.
Lemons
Add acidity and extra pectin, supporting a clear, firm set.

The step that matters

Boil while stirring until the syrup jellies. Sugar and pectin only set when the syrup is boiled long enough to reach the right concentration. Stirring prevents scorching on the base. Stop too early and it stays runny; go too far and it turns 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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