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Peach Marmalade, or Jam

A fruit preserve made by cooking peaches with sugar and lemon juice.

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 Marmalade, or Jam

Ingredients

Directions

Prepare

  1. Pare and stone the peaches, then weigh them.

Make the marmalade

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

  2. Remove from heat and stir in 10 ounces of sugar for each pound of peaches.

  3. Skim off any foam, then boil briskly for 5 minutes.

  4. Add the strained juice of 1-2 lemons.

  5. Boil for an additional 3 minutes.

  6. Two minutes after adding the sugar, stir in the blanched peach kernels if using.

Jar

  1. Pour out the marmalade into jars.

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 pulp and natural pectin that give the marmalade its body.
Sugar
Sweetens and, with the fruit's acid and pectin, helps the marmalade set.
Lemon juice
Adds acidity that brightens the flavour and helps pectin set.

The step that matters

Boil briskly for 5 minutes after adding the sugar. Sugar must fully dissolve and the mixture must reach a hard, rapid boil so pectin and acid can form a gel. Boiling too gently leaves the marmalade runny, while boiling too long darkens flavour and can make it overly stiff.

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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