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Sauce

A Fine Sauce for Steaks

A sauce made with fat, onions, gravy, flour, vinegar, mustard, and cayenne pepper, served with steaks.

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 ↓

A Fine Sauce for Steaks

Ingredients

Directions

Cook the onions

  1. In a saucepan, heat the fat over medium heat.

  2. Add the sliced onions and cook until browned.

Finish the sauce

  1. Stir in the gravy, flour, vinegar, mustard, and cayenne pepper.

  2. Bring to a boil and serve with steaks.

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

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

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

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

  5. Flour + mustardtop 13% of all pairs
    Smell alikemoderate
    Cooked together5,066 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Fat
Carries heat evenly and helps the onions brown and develop rich flavour.
Onions
Browning caramelises their natural sugars, adding sweetness and depth to the sauce.
Gravy
Forms the savoury liquid base and adds moisture and meaty flavour.
Flour
Starch thickens the liquid as it heats, giving the sauce body.
Vinegar
Adds acidity that brightens the sauce and balances the richness.
Mustard
Adds sharp tang and a little pungency that rounds out the flavour.

The step that matters

Browning the onions. Cooking the onions until deeply browned lets the Maillard reaction and caramelisation build savoury, sweet flavour. Pale onions leave the sauce flat, while over-darkened onions turn bitter and can taint the whole sauce.

Swap the onion

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

  1. Horseradishfits better
  2. Shallotfits better
  3. Lettucefits better
  4. Onionthe original

Fit is the average pairing score against egg, flour, vinegar, mustard, 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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