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Sauce Robert- -robert Sauce

A French brown sauce made with onions, butter, vinegar, brown sauce, veal gravy, and French mustard.

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

Sauce Robert- -robert Sauce

Ingredients

Directions

  1. Chop the onions finely and fry them in butter without allowing them to brown.

  2. Drain the butter and add the vinegar; let it reduce.

  3. Moisten with the brown sauce and veal gravy; reduce well.

  4. Finish with the French mustard.

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

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

  2. Vinegar + mustardtop 7% of all pairs
    Smell alikemoderate
    Cooked together14,067 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Sauce + mustardtop 13% of all pairs
    Smell alikemoderate
    Cooked together2,120 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  4. Onion + vinegartop 14% of all pairs
    Smell alikemoderate
    Cooked together18,226 recipes

    Shared aroma: acetic acid (sour, vinegar).

  5. Butter + saucetop 15% of all pairs
    Smell alikelow
    Cooked together15,338 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

Butter and sauce barely smell alike, yet cooks put them together in 15,338 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

Onions
Soften and release sweetness and aromatic flavour as the base of the sauce.
Vinegar
Adds acidity that sharpens the sauce and balances its richness as it reduces.
Brown sauce
Provides the main body, savoury depth and colour of the sauce.
Brown veal gravy
Adds meaty richness and gelatin, deepening flavour and body as it reduces.
French mustard
Adds sharp, pungent flavour that rounds out the finished sauce.

The step that matters

Fry the onions without browning. Onions that brown turn bitter and dark, which would carry into the whole sauce. Keeping them pale in butter lets them soften and sweeten gently, giving a clean, mild base.

Swap the mustard

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

  1. Shallotfits about as well
  2. Mustardthe original
  3. Chivefits about as well
  4. Capsicumfits about as well

Fit is the average pairing score against onion, butter, vinegar, sauce, veal. 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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