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Dessert

Grape Fruit Marmalade

A marmalade made from sliced orange, grapefruit, lemon, water, and sugar, boiled and left to set.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Grape Fruit Marmalade

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 ↓

Grape Fruit Marmalade

Ingredients

Directions

Prepare the fruit

  1. Slice the orange, grapefruit, and lemon as finely as possible.

  2. Measure the sliced fruit in a bowl and add three times as much water.

  3. Let the mixture stand overnight.

Cook and set

  1. The next day, boil the mixture for thirty minutes.

  2. Let it stand again overnight with an equal quantity of sugar.

  3. Boil again for about half an hour 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.

Photo for illustrative purposes only · Contact us to use it

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. Orange + grapefruittop 1% of all pairs
    Smell alikestrong
    Cooked together233 recipes

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

  3. Grapefruit + lemontop 4% of all pairs
    Smell alikestrong
    Cooked together184 recipes

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

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

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

  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

Grapefruit
Provides the bitter peel and pulp that give the marmalade its characteristic flavour.
Orange
Adds sweetness and aromatic peel oils, balancing the bitterness of the grapefruit.
Lemon
Adds acidity and pectin-rich pith that helps the marmalade set.
Sugar
Sweetens the marmalade and, with boiling, helps it thicken and set to a jelly.

The step that matters

Boil again until it jellies. Setting depends on pectin, acid and sugar reaching the right concentration. Under-boiling leaves the marmalade runny, while over-boiling can make it dark and sticky.

Swap the grapefruit

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

  1. Grapefruitthe original
  2. Limefits about as well
  3. Vanillafits less well
  4. Blueberryfits less well

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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