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Sauce

Herb Sauce

A quick herb sauce made with parsley, onion, butter, salt, pepper, and white sauce.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Herb Sauce

Ingredients

Directions

Make the sauce

  1. In a saucepan, combine parsley, onion, butter, salt, and pepper.

  2. Cook over medium heat for 3 to 4 minutes.

  3. Pour in the white sauce and stir until it boils vigorously.

Serve

  1. Serve immediately.

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. Parsley + peppertop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Parsley + oniontop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

    Shared aroma: 2,4-decadienal (seaweed).

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

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

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

    Shared aroma: ethanol (alcoholic, ethereal).

  5. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

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

Parsley
Adds fresh, green herbal flavor and aroma to the sauce.
Onion
Adds savory aromatic depth as it softens in the butter.
Butter
Carries the herb and onion flavors and adds richness to the sauce.
White sauce
Forms the creamy base that the herbs and butter are stirred into.

The step that matters

Stir until it boils vigorously. Bringing the white sauce to a full boil after adding it helps it cook through and thicken fully, so the sauce holds together and tastes cooked rather than raw-starchy.

Swap the onion

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

  1. Shallotfits better
  2. Carrotfits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against parsley, butter, 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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