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Dessert

Lemon Filling

A sweet lemon filling made with sugar, lemon, flour, eggs, and vanilla.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Sugar and vanilla are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 35,032 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Lemon Filling

Ingredients

Directions

Make the lemon filling

  1. In a bowl, mix sugar, flour, lemon rind, lemon juice, and egg yolks.

  2. Add cold water and salt, then cook over simmering water for 30 minutes, stirring until thickened.

  3. Cool the mixture.

Make the meringue and finish

  1. In a separate bowl, beat egg whites until stiff.

  2. Gradually add half of the powdered sugar while beating vigorously.

  3. Gently fold in the remaining powdered sugar and vanilla.

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. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

  2. Flour + vanillatop 12% of all pairs
    Smell alikemoderate
    Cooked together19,241 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Lemon + vanillatop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  4. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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 yolks
Thicken the custard as they cook and add richness to the filling.
Flour
Thickens the lemon mixture so it sets as it cooks.
Egg whites
Whipped to stiff foam that gives the topping its light, airy structure.
Lemon
Rind and juice supply aroma and sharp acidity that balances the sugar.
Sugar
Sweetens the filling and helps soften the texture of the custard.

The step that matters

Cooking the filling until thickened. Egg yolks and starch must be heated gently and stirred until thickened; overheating can curdle the yolks, while underheating leaves the filling runny and unset.

Swap the lemon

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

  1. Raisinfits better
  2. Blueberryfits better
  3. Figfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, flour, egg, vanilla. 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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