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Dessert

Hartshorn Jelly

A gelatinous dessert made from hartshorn shavings, citrus rinds, lemon juice, sugar, and egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Orange and lemon 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

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

  1. Simmer hartshorn shavings with water for 30 minutes.

  2. Strain the mixture and boil it with the rinds of the oranges and lemons.

  3. When cold, add the lemon juice, sugar, and beaten egg whites.

  4. Let the jelly boil 3 to 4 times without stirring.

  5. Strain it through a jelly bag.

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. Orange + lemontop 1% of all pairs
    Smell alikestrong
    Cooked together10,634 recipes

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

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

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

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

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

  4. Orange + sugartop 20% of all pairs
    Smell alikelow
    Cooked together19,212 recipes

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

  5. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

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
Gelling agent that sets the liquid into a firm jelly as it cools.
Egg whites
Clarify the jelly, binding impurities that are then removed when it is strained.
Sugar
Adds sweetness and body to the jelly.
Lemon juice
Adds acidity that brightens the flavour of the jelly.

The step that matters

Straining through the jelly bag. Egg whites bind cloudy particles as the jelly boils; the clear liquid only forms when it is strained gently and without disturbing the coagulated whites, so the jelly stays bright rather than cloudy.

Swap the orange

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

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

Fit is the average pairing score against lemon, sugar, 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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