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Dessert

Peach Jam, or Marmalade

A preserve made from ripe peaches, sugar, lemon juice, and optional peach kernels.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Peach and lemon work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 947 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Peach Jam, or Marmalade

Ingredients

Directions

Cook the peaches

  1. Boil the peeled and pitted peaches in a pot for 45 minutes, stirring often.

Add sugar and lemon

  1. Remove from heat and mix in the powdered sugar, ensuring to clear any scum.

  2. Boil briskly for 5 minutes, then add the strained lemon juice and continue boiling for 3 more minutes.

  3. After 2 minutes of adding sugar, stir in the blanched peach kernels if using.

Finish

  1. For a smoother texture, press the mixture through a sieve after boiling.

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. Peach + lemontop 12% of all pairs
    Smell alikemoderate
    Cooked together947 recipes

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

  2. Peach + sugartop 17% of all pairs
    Smell alikelow
    Cooked together2,308 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 lemon 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

Peaches
Provide the fruit body and flavour that make up most of the jam.
Sugar
Adds sweetness and helps the jam thicken and set as it boils.
Lemon juice
Adds acidity that brightens flavour and helps the pectin set.

The step that matters

Boil briskly after adding the sugar. Sugar and the fruit's natural pectin need a hard, sustained boil to reach the setting point. Under-boiling leaves the jam runny, while overcooking can make it dull and sticky.

Swap the peach

The recipe marks peach as optional. How well each one fits the dish's main ingredients (sugar, lemon):

  1. Orangefits better
  2. Limefits better
  3. Vanillafits better
  4. Peachthe original

Fit is the average pairing score against sugar, lemon. 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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