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Sauce

Brown Sauce

A savory sauce made from browned onion, butter, brown gravy, mustard, salt, pepper, and optional Worcestershire sauce, thinned with stock or water.

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

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

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

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

  4. Bring to a boil; if too thick, thin with stock, gravy, or hot water with butter.

  5. 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
Frying until brown adds sweetness and a deep savory flavor to the sauce.
Butter
Fat for frying the onion, adding richness and browning.
Brown gravy from roast beef
Forms the liquid base of the sauce, providing meaty flavor and body.
Mustard
Adds sharp, acidic bite that balances the richness of the gravy.

The step that matters

Frying the onion until brown. Browning develops sweetness and deep flavor through the Maillard reaction. Pale onions leave the sauce tasting flat, while over-browned onions turn bitter.

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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