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Sauce

Lemon Sauce

A sauce made with lemon juice, sugar, butter, egg, cornstarch, and hot water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Lemon Sauce

Why it works: Lemon and butter 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 Sauce

Ingredients

Directions

  1. Mix the butter and sugar together.

  2. Add the egg and cornstarch, then the juice and grated rind of the lemon.

  3. Stir in the hot water.

  4. Cook until thick.

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.

Photo for illustrative purposes only · Contact us to use it

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 + buttertop 16% of all pairs
    Smell alikemoderate
    Cooked together41,227 recipes

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

  2. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

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

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

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

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

Egg
Adds richness and helps thicken the sauce as it heats.
Cornstarch
Thickens the sauce when heated with liquid by swelling and gelling its starch.
Butter
Adds fat for a smooth, rich texture and mouthfeel.
Lemon
Provides acidity and bright aroma from its juice and rind.
Sugar
Sweetens the sauce and balances the lemon's acidity.

The step that matters

Cook until thick. Cornstarch only thickens fully once it is heated while stirring, so the sauce should be cooked until it coats a spoon. Stopping early leaves it thin, while overheating can make the egg scramble or the starch break down.

Swap the lemon

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

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

Fit is the average pairing score against sugar, butter, 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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