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Brown Sauce

A savory sauce made from browned onion, butter, beef gravy, mustard, and seasonings.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Brown Sauce

Why it works: Onion and mustard match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Brown Sauce

Ingredients

Directions

Make the sauce

  1. Slice the onion and fry it in butter until brown.

  2. Cover the onion with the rich brown gravy from roast beef.

  3. Add mustard, salt, pepper, and Worcestershire sauce if desired.

  4. Bring the mixture to a boil.

  5. If the sauce is too thick, thin it with stock, gravy, or a little hot water with butter.

Finish and serve

  1. Strain the sauce through a fine sieve before serving.

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 + mustardtop 6% of all pairs
    Smell alikestrong
    Cooked together9,259 recipes

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

  2. Onion + beeftop 7% of all pairs
    Smell alikemoderate
    Cooked together17,092 recipes

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

  3. Mustard + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

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

  4. Beef + peppertop 10% of all pairs
    Smell alikemoderate
    Cooked together18,971 recipes

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

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

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Onion
Softens and browns in butter, adding sweetness and savory depth to the sauce.
Butter
Fat that browns the onion and carries flavor into the sauce.
Rich brown gravy from roast beef
Forms the liquid base of the sauce, supplying meaty flavor and body.
Mustard
Adds sharpness that balances the richness of the gravy and butter.

The step that matters

Browning the onion in butter. Onion that is only pale or steamed gives a flat, sweet taste. Frying it until deep brown lets the Maillard reaction build the roasted flavor that the whole sauce depends on.

Swap the mustard

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

  1. Potatofits better
  2. Capsicumfits better
  3. Tomatofits better
  4. Mustardthe original

Fit is the average pairing score against onion, butter, beef, pepper, sauce. 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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