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Dessert

Orange Marmalade

A preserve made from oranges, grapefruit, lemons, pineapple, and sugar, cooked until it jellies.

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. Wash the fruit well.

  2. Remove the peel.

  3. Discard the seeds.

  4. Cut the fruit into small pieces.

  5. Cut the peel into thin slices.

  6. Add the peel to the pulp.

  7. Cover the mixture with water.

  8. Let it stand for 24 hours.

Cook the rind

  1. Boil the mixture until the rind is tender.

  2. Remove from heat.

  3. Let it stand for another 24 hours.

Add sugar and set

  1. Weigh 1 pound of sugar for every pound of fruit and juice.

  2. Cook the mixture until it jellies.

Jar

  1. Fill small jars or glasses.

  2. Let them cool completely before covering.

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. 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. Orange + pineappletop 6% of all pairs
    Smell alikemoderate
    Cooked together1,664 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

  5. Grapefruit + pineappletop 6% of all pairs
    Smell alikemoderate
    Cooked together95 recipes

    Shared aroma: ethyl isobutyrate (fruity, ethereal).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Sugar
Adds sweetness and, once cooked with the fruit, helps the mixture set into a jelly.
Lemons
Add acidity, which supports setting and balances the sweetness of the sugar.
Oranges
Provide the pulp and thin-sliced peel that give the marmalade its body and bitter citrus flavour.
Grapefruit
Adds more pulp and peel, contributing body and a sharper citrus bitterness.

The step that matters

Cook the mixture until it jellies. The mixture must reach the gel point. Sugar and fruit solids concentrate as water evaporates while boiling. Stopping too early leaves the marmalade runny, while cooking too long makes it stiff and dull.

Swap the pineapple

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

  1. Limefits better
  2. Vanillafits about as well
  3. Mangofits about as well
  4. Pineapplethe original

Fit is the average pairing score against orange, grapefruit, 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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