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Dessert

Lemon Mousse

A chilled dessert made with lemon juice, sugar, egg whites, egg yolks, corn starch, and milk.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Corn and milk are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 6,955 recipes. Both carry hexanal, which smells green, grassy. The science ↓

Lemon Mousse

Ingredients

Directions

Prepare the lemon base

  1. Combine sugar and lemon juice in a bowl, then strain the mixture.

  2. Beat egg whites until stiff peaks form, then fold into the lemon mixture.

  3. Quickly pour the mixture into a mold and refrigerate until set.

Make the custard and serve

  1. Whisk egg yolks with corn starch, then stir into boiling milk.

  2. Sweeten custard to taste and serve cold with lemon mousse.

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. Corn + milktop 10% of all pairs
    Smell alikemoderate
    Cooked together6,955 recipes

    Shared aroma: hexanal (green, grassy).

  2. Lemon + corntop 13% of all pairs
    Smell alikemoderate
    Cooked together1,927 recipes

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

  3. Lemon + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

  4. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  5. Egg + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 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 whites
Whipped into stiff peaks, they trap air and give the mousse its light, airy structure.
Egg yolks
Thicken the custard and add richness and a smooth texture.
Corn starch
Thickens the milk-and-yolk custard so it holds body when cooled.
Sugar
Sweetens the mousse and balances the sharpness of the lemon juice.
Lemon juice
Adds acidity and bright lemon flavour that cuts the sweetness.

The step that matters

Fold the whipped egg whites in gently. Whipped egg whites hold air bubbles that give mousse its lightness. Stirring or deflating them vigorously collapses the foam, leaving a dense, flat set texture.

Swap the lemon

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

  1. Vanillafits better
  2. Coconutfits better
  3. Figfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, egg, corn, milk. 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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