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Dessert

Irish Moss Jelly

A gelatinous dessert made from Irish moss, lemon, sugar, and nutmeg.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Irish moss and nutmeg share more aroma than cooks usually use. They rank in the top 4% of all ingredient pairs, and cooks put them together in 15 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Irish Moss Jelly

Ingredients

Directions

Prepare

  1. Pick over and wash the Irish Moss carefully.

Make the jelly

  1. Put the moss into boiling water, add the lemon rind and sugar.

  2. Simmer until the moss is dissolved.

  3. Add the lemon juice and nutmeg, then strain into a cold, wet mold.

Set and serve

  1. Set aside to harden and serve plain or with cream.

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. Irish moss + nutmegtop 4% of all pairs
    Smell alikestrong
    Cooked together15 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Lemon + nutmegtop 5% of all pairs
    Smell alikestrong
    Cooked together11,318 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  3. Irish moss + lemontop 10% of all pairs
    Smell alikemoderate
    Cooked together61 recipes

    Shared aroma: coumarin (sweet, hay).

  4. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Sugar + nutmegtop 20% of all pairs
    Smell alikelow
    Cooked together23,364 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

Lemon and sugar 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

Irish moss
Seaweed that releases gelling compounds, giving the liquid a firm jelly structure as it cools.
Sugar
Sweetens the jelly.
Lemon juice
Adds acidity that brightens the flavor.
Lemon rind
Adds fragrant citrus aroma to the cooking liquid.

The step that matters

Simmer until the moss is fully dissolved. Irish Moss must break down completely in the hot liquid to release its gelling compounds. Undissolved pieces leave the jelly weak or lumpy once it cools and sets.

Swap the lemon

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

  1. Vanillafits better
  2. Lemonthe original
  3. Raisinfits less well
  4. Limefits less well

Fit is the average pairing score against irish moss, sugar, nutmeg. 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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