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Dessert

Peach Jam, or Marmalade

A preserved fruit spread made from ripe peaches, sugar, lemon juice, and optional blanched 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

Prepare

  1. Ensure peaches are ripe and sound, then pare, stone, and weigh them.

Cook

  1. Boil the peaches quickly for 45 minutes, stirring often.

  2. Remove from heat and mix in the powdered sugar, skimming off any scum.

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

  4. Pour out the marmalade.

  5. After 2 minutes, add the blanched peach kernels if desired.

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 bulk, flavour and pectin-bearing pulp that give the marmalade its body.
Sugar
Sweetens the marmalade and, with boiling, helps it thicken and set.
Lemon juice
Adds acidity that brightens the flavour and supports setting.

The step that matters

Skimming off the scum after adding the sugar. Scum is foam and impurities rising as sugar dissolves and the mixture boils. Leaving it in can cloud the marmalade and spoil its clean texture, so it should be skimmed off before boiling briskly.

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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