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Sauce

Thick White Sauce

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

From an old cookbook · modernised transcription
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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 ↓

Thick White Sauce

Ingredients

Directions

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

  1. Melt the butter in a saucepan over medium heat.

  2. Stir in the flour and cook for 1-2 minutes until lightly golden.

  3. Gradually add the scalded milk, whisking continuously to prevent lumps.

  4. Add salt and pepper, and cook until the sauce thickens, stirring constantly to avoid scorching.

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

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + peppertop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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
Provides fat that carries flavour and helps form the base roux with the flour.
Flour
Its starch thickens the milk as it cooks, giving the sauce body.
Milk
Forms the liquid that the starch swells in, becoming the body of the sauce.

The step that matters

Adding the milk to the roux. Cold or fast-added liquid can clump the flour's starch before it disperses. Adding the milk gradually while whisking keeps the starch evenly distributed so the sauce thickens smoothly.

“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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