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Sauce

Egg Sauce

A thick sauce made from butter, flour, boiling water, and hard‑boiled egg yolks, seasoned with salt, pepper, and parsley.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Egg Sauce

Ingredients

Directions

  1. Melt the butter in a saucepan.

  2. Mix in the flour until well combined.

  3. Pour in enough boiling water to make a thick batter.

  4. Boil while stirring until done.

  5. Add the yolks of the hard-boiled eggs, salt, pepper, and parsley.

  6. Serve hot in a sauceboat.

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. Pepper + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + parsleytop 12% of all pairs
    Smell alikemoderate
    Cooked together16,675 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + parsleytop 15% of all pairs
    Smell alikemoderate
    Cooked together28,563 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

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

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour 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

Butter
Melts to form the fat base that the flour is cooked into.
Flour
Thickens the sauce when cooked with butter and water.
Hard-boiled egg yolks
Add richness and a creamy texture to the sauce.

The step that matters

Boil while stirring until done. Flour thickens only when its starch swells in hot liquid. Stirring keeps the mixture smooth and prevents lumps, and the sauce must be cooked long enough for the raw flour taste to fade.

Flavor stand-ins for the parsley

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

  1. Parsleythe original
  2. Nutmegabout as good a flavor fit

Fit is the average pairing score against butter, flour, egg, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).

“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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