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Lemon Jelly

A clear lemon-flavored jelly made with lemon juice, water, sugar, egg whites, shells, and rind.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Lemon and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Lemon Jelly

Ingredients

Directions

Make the jelly

  1. Combine the lemon juice, water, and sugar in a saucepan.

  2. Whisk the egg whites and shells together, then add the lemon rind.

  3. Whisk this mixture into the jelly in the saucepan and bring to a brisk boil for 2 minutes.

Clarify and strain

  1. Cover the saucepan and let it sit for 30 minutes before straining through a jelly bag.

  2. If the jelly is not clear, strain it again.

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

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

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

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

  3. 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

Whites of 2 eggs
Egg whites coagulate when heated, trapping cloudy particles so they can be strained out for a clear jelly.
Shells of 2 eggs
Shells add calcium and help the egg whites bind impurities as they are heated and strained.
Juice of 4 lemons
Provides the acidity and bright lemon flavor that define the jelly.
Sugar (to taste)
Adds sweetness and helps the mixture set into a firm jelly when cooled.

The step that matters

Straining the jelly clear. Egg whites must be heated to coagulate and trap cloudy particles. Letting the mixture rest before straining allows the particles to settle, and straining again if cloudy gives a clear result.

Swap the lemon

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

  1. Vanillafits better
  2. Raisinfits about as well
  3. Lemonthe original
  4. Datesfits less well

Fit is the average pairing score against 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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