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Dessert

Peach Jelly

A fruit jelly made from peaches, clarified sugar syrup, lemon juice, and isinglass.

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 Jelly

Ingredients

Directions

Prepare the fruit

  1. Cut the peaches in half, remove the pits, and peel them.

  2. Boil the clarified sugar and water until it has boiled and been skimmed.

  3. Add the peaches and broken kernels, and boil gently for 10 minutes.

  4. Remove 4 or 5 peach halves for garnishing the jelly.

  5. Continue boiling the remaining peaches for a few more minutes.

Make the jelly

  1. Cut the rinds off the lemons and squeeze the juice through a sieve into a basin.

  2. Pass the syrup through the sieve with the lemon juice and isinglass three times.

Set the molds

  1. Fill your molds half-full with jelly, then add the reserved peaches and a little more jelly.

  2. Once that is set, fill up the molds with the remaining jelly.

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 flavor and the body of the jelly, and are reserved as garnish.
Isinglass
Gelatin-like protein that sets the liquid into a firm, wobbly jelly when cooled.
Lemons
Add acidity that brightens the sweetness and balances the flavor of the syrup.
Clarified sugar and water
Forms the sweet syrup base that carries the fruit flavor and helps the jelly hold its shape.

The step that matters

Passing the syrup through the sieve with lemon juice and isinglass three times. Isinglass must be fully dissolved and the liquid kept clear. Straining several times removes particles that would cloud the jelly, and the isinglass sets the liquid only when it is evenly distributed.

Swap the lemon

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

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

Fit is the average pairing score against peach, 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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