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Dessert

Apple Marmalade

A preserve made from sliced apples, sugar, water, and lemon juice, boiled until smooth.

From an old cookbook · modernised transcription
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Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Apple Marmalade

Ingredients

Directions

Make the syrup

  1. Combine 4 pounds sugar with 1 quart water.

  2. Stir until dissolved.

  3. Place the kettle over heat.

  4. When it begins to boil, add 1 cup cold water.

Cook the marmalade

  1. Let the mixture boil slowly until the apples break down and can be stirred into a smooth consistency.

  2. Boil quickly to evaporate excess liquid.

  3. Add a few drops of lemon juice just before removing from heat.

Jar and store

  1. Transfer the marmalade into china or earthen jars.

  2. Seal tightly.

  3. Brandy the marmalade.

  4. Cover it with paper.

  5. Store in a cool, dry place.

Turn out

  1. Wet the mold with hot water before turning out the marmalade.

  2. Turn out the marmalade.

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. Apple + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Sugar + appletop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Sugar and apple barely smell alike, yet cooks put them together in 16,478 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

Sliced dessert apples
Break down into the body of the marmalade, giving it a thick, smooth texture.
Sugar
Sweetens the marmalade and, as the liquid cooks off, helps it thicken and keep.
Lemon juice
Adds acidity that brightens the flavour and helps balance the sweetness.

The step that matters

Let the mixture boil slowly until the apples break down. Gentle boiling lets the apples soften fully and release their body into the syrup without scorching the sugar. Boiling off excess liquid afterward firms the mixture to a spreadable consistency.

Swap the lemon

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

  1. Pearfits better
  2. Vanillafits better
  3. Apricotfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, apple. 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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