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Dessert

Hartshorn Jelly

A gelatinous dessert made from boiled hartshorn shavings, citrus rinds, sugar, brandy, egg whites, and optional isinglass.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Lemon and orange match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 10,634 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Hartshorn Jelly

Ingredients

Directions

  1. Boil the hartshorn shavings in water for 3 hours.

  2. Strain through a jelly bag and boil again for 30 minutes with the lemon and orange rinds.

  3. When cool, add the juice, sugar, brandy, beaten egg whites, and crushed shells.

  4. Boil the mixture again for a few minutes without stirring, then strain until clear.

  5. If it doesn't seem likely to stiffen, dissolve isinglass in it.

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. Lemon + orangetop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

    Shared aroma: 3-hexenal (apple, fruity).

  2. Orange + brandytop 15% of all pairs
    Smell alikelow
    Cooked together2,706 recipes

    Shared aroma: beta-damascenone (apple, rose).

  3. Brandy + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together7,340 recipes

    Shared aroma: acetoin (butter, cream).

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

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

  5. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

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

Hartshorn shavings
Gelatin-rich base that sets the liquid into a firm jelly when cooled.
Egg whites
Bind with impurities when boiled, forming a foam that is strained off to clarify the jelly.
Sugar
Adds sweetness and balances the flavour of the citrus and brandy.
Lemon rind
Adds aromatic citrus oils that flavour the jelly as it simmers.
Brandy
Adds alcohol flavour and aroma and helps keep the jelly from spoiling.

The step that matters

Boil without stirring, then strain until clear. Stirring during the final boil breaks up the egg white foam so impurities stay suspended, leaving a cloudy jelly. Letting the mixture rest undisturbed lets the coagulated whites trap particles, which the jelly bag can then remove for a clear result.

Swap the orange

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

  1. Vanillafits about as well
  2. Orangethe original
  3. Raisinfits about as well
  4. Figfits about as well

Fit is the average pairing score against lemon, sugar, brandy, egg. 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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