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Sauce

Sauce Robert

A savory sauce made with onions, butter, flour, beef or veal gravy, mustard, salt, and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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

Ingredients

Directions

  1. In a stewpan, brown the diced onions in the butter.

  2. Once they are a deep yellow brown, add the flour and stir.

  3. Pour in the beef or veal gravy and let it simmer for 15 minutes.

  4. Skim the sauce, then season with salt and pepper.

  5. Just before serving, mix in the prepared 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. Onion + beeftop 7% of all pairs
    Smell alikemoderate
    Cooked together17,092 recipes

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

  3. Pepper + mustardtop 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

Onions
Browning them in butter builds deep, sweet flavour that gives the sauce its body and colour.
Butter
Fat that carries the onion flavour and helps the onions brown.
Flour
Thickens the sauce as it cooks with the gravy.
Beef or veal gravy
Forms the liquid base of the sauce and supplies savoury meat flavour.

The step that matters

Browning the onions to a deep yellow brown. Onions that are only lightly softened give a pale, flat sauce. Cooking them until deep golden brown develops sweet, rich flavour through browning reactions, which then carries through the whole sauce.

Swap the mustard

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

  1. Potatofits better
  2. Chivefits better
  3. Leekfits better
  4. Mustardthe original

Fit is the average pairing score against onion, butter, flour, beef, 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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