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Sauce

Lemon Sauce

A thickened sauce made with sugar, flour, boiling water, butter, lemon rind, and lemon juice.

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

Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Lemon Sauce

Ingredients

Directions

  1. Mix the sugar and flour thoroughly.

  2. Slowly add the boiling water while stirring constantly.

  3. Cook for eight minutes.

  4. Add the butter, lemon rind, and lemon juice.

  5. Stir until the butter has melted.

  6. If the sauce is too thick, add a little hot water.

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. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

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

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

  4. Flour + lemontop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: guaiacol (smoky, sweet).

Flour and butter barely smell alike, yet cooks put them together in 124,287 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

Flour
Thickens the boiling water into a smooth, cohesive sauce as its starch swells when heated.
Sugar
Sweetens the sauce and balances the sharpness of the lemon juice.
Butter
Adds richness and a silky mouthfeel as it melts into the sauce.
Lemon juice
Provides the sharp, acidic flavour that defines the sauce.

The step that matters

Adding the boiling water slowly while stirring constantly. Pouring the water in gradually while stirring keeps the flour dispersed, so it hydrates evenly and does not form lumps as the starch thickens.

Swap the lemon

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

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

Fit is the average pairing score against sugar, flour, butter. 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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