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Apple Jam

Apple jam made by cooking apples with sugar and lemon.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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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 Jam

Ingredients

Directions

Prepare

  1. Peel and slice the apples.

Cook

  1. Combine apples, sugar, lemon juice, and lemon rind in a pot.

  2. Boil slowly, stirring and mashing until the mixture becomes clear.

Finish

  1. Pour the jam into molds.

  2. Soak the apples in water to preserve their color.

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. Apple + sugartop 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).

Apple and sugar 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

Cooking apples
Provide the bulk and natural pectin that helps the jam thicken and set.
Loaf sugar
Adds sweetness, helps the jam set, and preserves it against spoilage.
Lemon juice
Adds acidity that brightens flavor and helps pectin gel properly.
Lemon rind
Adds fragrant citrus oils that give the jam a fresh aroma.

The step that matters

Boil slowly and stir until clear. Sugar and fruit scorch easily on the bottom of the pot, so slow heat with constant stirring prevents burnt flavor. Cooking until the mixture turns clear and thick helps pectin and sugar reach a proper set.

Swap the lemon

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

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

Fit is the average pairing score against apple, 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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