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Dessert

Orange Marmalade

A preserved citrus spread made from bitter oranges, sweet orange, lemon, sugar, and water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 the fruit

  1. Pare the skins of the oranges and lemon very thinly and cut them into thin chips.

  2. Slice the whole oranges into the thinnest possible slices, removing all the pips.

  3. Combine the sliced oranges, skins, and cold water in a basin and let it stand for 24 hours.

Cook and set

  1. Transfer the mixture to a preserving pan and boil until tender and transparent, about 3 hours.

  2. Allow it to stand for another 24 hours.

  3. In the preserving pan, add 1 lb. of sugar for each pint of juice and boil for at least 30 minutes or until it 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. Bitter orange + orangetop 17% of all pairs
    Smell alikelow
    Cooked together23 recipes

    Shared aroma: acetal (cream, earthy).

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

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

  4. Bitter orange + lemontop 19% of all pairs
    Smell alikelow
    Cooked together21 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  5. 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

Bitter oranges
Provide the main fruit flavour and the pectin-rich pith and pips that help the marmalade set.
Sugar
Sweetens and, once boiled with the fruit juice, helps the marmalade thicken and set.
Lemon
Adds acidity and extra pectin to support setting and brighten the flavour.

The step that matters

Boiling with the sugar until it jellies. Sugar and pectin only set when the mixture reaches a high enough concentration and the right acidity. Boiling too briefly leaves the marmalade runny, while overcooking can make it dark and bitter.

Swap the bitter orange

How well each one fits the dish's main ingredients (orange, lemon, sugar):

  1. Limefits better
  2. Vanillafits better
  3. Blueberryfits better
  4. Bitter orangethe original

Fit is the average pairing score against orange, lemon, 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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