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Dessert

Peach Jelly

A gelatinous dessert made from peaches, sugar, water, lemon juice, and isinglass.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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

  1. Dissolve the isinglass in sufficient water and strain it.

  2. Halve and peel the peaches.

Make the jelly

  1. Make a syrup by boiling the sugar and ½ cup water together.

  2. Add the peaches and kernels to the syrup and boil gently for 15 minutes.

  3. Remove the fruit and cook the syrup for an additional 10 minutes.

  4. Stir in the lemon juice and isinglass.

Set in the mold

  1. Fill a pyramid mold partially with jelly.

  2. Add some peaches to the mold.

  3. Allow the mixture to set.

  4. Add more jelly and repeat until the mold is full.

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

Isinglass
Gelatin-like protein that sets the syrup into a firm, sliceable jelly.
Sugar
Adds sweetness and, when concentrated by boiling, helps the jelly hold its set.
Peaches
Provide the fruit flavor and body that the jelly holds around them.
Lemon juice
Adds acidity that brightens the sweet syrup and balances its flavor.

The step that matters

Stir in the lemon juice and isinglass. Isinglass must be fully dissolved and evenly mixed into the hot syrup before it cools, because it sets as it cools. Clumps or stirring it in too late leave weak or uneven set spots in the jelly.

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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