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Sauce

Thin White Sauce

A light sauce made with butter, flour, milk, salt, and white pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Thin White Sauce

Why it works: Butter and milk 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 ↓

Thin White Sauce

Ingredients

Directions

Make the roux

  1. Melt the butter in a saucepan.

  2. Add the flour mixed with salt and pepper; stir to form a smooth paste.

Add the milk and finish

  1. Slowly add the hot milk while stirring constantly.

  2. Bring to a boil and beat until smooth and glossy using a whisk.

  3. Do not allow the sauce to cook after it has reached the boiling point.

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. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Flour + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + white peppertop 28% of all pairs
    Smell alikelow
    Cooked together3,814 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  5. White pepper + milktop 31% of all pairs
    Smell alikelow
    Cooked together1,304 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

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
Carries fat into the sauce, adding richness and a smooth mouthfeel.
Flour
Its starch swells in the hot liquid and thickens the sauce into a smooth body.
Milk
Forms the liquid base that the flour thickens into a pourable sauce.

The step that matters

Stop cooking once the sauce boils. Starch thickens fully when the sauce reaches a boil. Cooking longer risks scorching on the pan base and can thin the sauce as the starch breaks down.

Swap the white pepper

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

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

Fit is the average pairing score against butter, flour, 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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