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White Sauce

A creamy milk-based sauce with butter, onion, flour, and spices, finished with optional egg.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 12 ingredients
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Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

White Sauce

Ingredients

Directions

Prepare the base

  1. Boil a stick of celery and a bunch of parsley in the milk, adding white pepper and a little salt.

  2. In a saucepan, melt the butter and add the sliced onion.

  3. Sprinkle in the flour to form a paste, but do not let it brown.

Make the sauce

  1. Strain the milk and gradually add it to the butter and flour mixture, stirring well.

  2. Boil the mixture while stirring until it thickens and becomes smooth.

  3. Pass it through a fine sieve.

Finish with egg

  1. Let it cool slightly, then mix in a beaten egg, warming gently without boiling.

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. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Butter + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  3. White pepper + macetop 9% of all pairs
    Smell alikemoderate
    Cooked together1,695 recipes

    Shared aroma: myrcene (balsamic, herbaceous).

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Milk + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 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

Milk
Forms the liquid base that the flour thickens into a smooth sauce.
Butter
Carries the flour into a paste and adds rich, fatty flavour to the sauce.
Flour
Thickens the sauce as its starch swells when the liquid is heated and stirred.
Onion
Adds savoury flavour to the butter, which is strained out before the sauce is finished.
Egg
Enriches the sauce and thickens it slightly as its proteins set when gently warmed.

The step that matters

Warm the egg gently without boiling. Egg proteins set and can scramble when overheated, so boiling after adding the egg can curdle the sauce and leave it grainy instead of smooth.

Swap the white pepper

How well each one fits the dish's main ingredients (milk, butter, onion, flour, lemon, mace, cream):

  1. Nutmegfits better
  2. Cinnamonfits better
  3. Parsleyfits better
  4. White pepperthe original

Fit is the average pairing score against milk, butter, onion, flour, lemon, mace, cream. 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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