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Brown Sauce

A savory sauce made with butter, onion, flour, and brown stock.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Brown Sauce

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 ↓

Brown Sauce

Ingredients

Directions

Make the roux

  1. Cook the onion in butter or drippings until slightly browned, then remove the onion.

  2. Stir the butter or drippings constantly until well browned.

  3. Add the flour mixed with salt and pepper, then brown the mixture.

Finish the sauce

  1. Gradually add the brown stock, stirring continuously.

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

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Flour + peppertop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 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 or drippings
Carries heat and flavor, and its browning adds rich, nutty color to the sauce.
Flour
Thickens the sauce as its starch swells in the hot fat and liquid.
Brown stock
Supplies the liquid that becomes the sauce, along with savory body and flavor.
Onion
Adds aromatic flavor and a touch of sweetness as it browns in the fat.

The step that matters

Adding the stock gradually while stirring. Flour clumps when liquid is poured in all at once, because its outer starch hydrates before the inside can wet. Adding stock slowly and stirring constantly keeps the mixture smooth as the starch swells and thickens.

Swap the onion

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

  1. Shallotfits better
  2. Chivefits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against butter, flour, 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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