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Lemon Jelly Filling

A lemon-flavored jelly used as a filling.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Butter and lemon are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 41,227 recipes. Both carry 3-hexenal, which smells apple, fruity. The science ↓

Lemon Jelly Filling

Ingredients

Directions

  1. In a double boiler, combine the egg, melted butter, sugar, grated lemon rind, and lemon juice.

  2. Cook until the mixture thickens enough to spread.

  3. Remove from heat and let cool before using.

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. Butter + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

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

  2. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Coffee + sugartop 17% of all pairs
    Smell alikelow
    Cooked together4,344 recipes

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

  4. Butter + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. 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

Egg
Thickens the mixture as its proteins set when gently heated, giving the spreadable texture.
Melted butter
Adds richness and a smooth, silky mouthfeel to the set mixture.
Sugar
Sweetens the mixture and adds body that balances the sharp lemon.
Lemon juice
Supplies the sharp acidity that defines the flavour of the jelly.
Lemon rind
Contributes aromatic lemon oils that add fragrance beyond the juice's sourness.

The step that matters

Cook until it thickens enough to spread. The egg proteins set gradually as the mixture heats. Cooking gently in a double boiler and stopping at the right thickness prevents the egg from scrambling or curdling.

Swap the lemon

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

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

Fit is the average pairing score against egg, butter, coffee, 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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