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Dessert

Orange Marmalade

A fruit preserve made from oranges, lemons, grapefruit, water, and sugar.

From an old cookbook · modernised transcription
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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. Slice the oranges and lemons with the peel on, and use only the pulp of the grapefruit.

Cook the marmalade

  1. Add 1½ times as much water as the total amount of fruit and cook for 1½ hours.

  2. Let the mixture stand overnight.

  3. Measure the mixture again and add 1½ times as much sugar as the total amount of fruit.

  4. Cook for 45 to 60 minutes.

  5. Pour into glasses and let cool.

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. Lemon + grapefruittop 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

Oranges
Provide the bitter peel and pulp that give marmalade its characteristic flavor and body.
Lemons
Add acidity and natural pectin that help the marmalade set.
Grapefruit
Contribute pulp and pectin along with bitter flavor.
Sugar
Sweetens the marmalade and helps it set into a thick, spreadable texture.

The step that matters

Adding the sugar after the overnight rest. The mixture must be measured again so the sugar matches the actual volume of fruit and water. Sugar concentrates the liquid and, together with the acid and pectin from the citrus, lets it gel as it cools.

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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