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Sauce

White Sauce

A simple white sauce made with broth, onion, flour, milk, cream, and seasoning.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

White Sauce

Ingredients

Directions

Flavour the broth

  1. Boil the white broth with the onion for 30 minutes, then remove the onion.

Thicken and finish

  1. Mix the flour with the cold milk until smooth.

  2. Stir the flour mixture into the broth and cook until thick.

  3. Add the cream and stir for 2–3 minutes without boiling.

  4. Season with salt and optional pepper or cayenne.

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. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Onion + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together32,460 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Milk + creamtop 18% of all pairs
    Smell alikemoderate
    Cooked together29,399 recipes

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

  5. Onion + creamtop 18% of all pairs
    Smell alikelow
    Cooked together10,827 recipes

    Shared aroma: 2-nonanone (fruity, floral).

Flour and milk barely smell alike, yet cooks put them together in 78,219 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 sauce as its starch swells in the hot liquid, giving body.
White broth
Forms the liquid base and carries most of the savoury flavour.
Onion
Infuses the broth with aroma and mild sweetness before it is removed.
Milk
Mixes with the flour first to make a smooth slurry and adds moisture.
Cream
Adds richness and a silkier texture to the finished sauce.

The step that matters

Mixing the flour with cold milk first. Starch granules clump when dry flour hits hot liquid. Dispersing the flour in cold milk until smooth lets the granules separate, so they thicken evenly without lumps.

Swap the onion

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

  1. Potatofits better
  2. Spinachfits better
  3. Arrowrootfits better
  4. Onionthe original

Fit is the average pairing score against flour, milk, cream, pepper. 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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