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Sauce

Onion Sauce, White

A white sauce made from onions, milk, flour, butter, pepper, salt, and nutmeg.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Onion Sauce, White

Ingredients

Directions

Prepare the onions

  1. Peel the onions and slice off the ends.

  2. Simmer the onions in enough cold water to cover them until tender.

  3. Drain the water and mince the onions finely.

Make the sauce

  1. In a saucepan, combine the minced onions with the milk, flour, butter, pepper, salt, and nutmeg.

  2. Stir the sauce over medium heat for 10 to 15 minutes.

  3. Serve hot.

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. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Pepper + nutmegtop 7% of all pairs
    Smell alikestrong
    Cooked together13,015 recipes

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

  3. Flour + nutmegtop 8% of all pairs
    Smell alikemoderate
    Cooked together18,623 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  5. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Flour and butter barely smell alike, yet cooks put them together in 124,287 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
Provide the main flavour and body, becoming soft and sweet after simmering and mincing.
Flour
Thickens the milk and butter into a smooth sauce as it heats.
Butter
Adds richness and carries flavour, while helping the flour cook smoothly.
Milk
Forms the liquid base that the flour thickens into a creamy sauce.

The step that matters

Stirring the sauce over medium heat. Flour thickens liquid only when heated while stirred; stirring prevents lumps and scorching on the pan base, keeping the sauce smooth.

Swap the onion

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

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

Fit is the average pairing score against milk, flour, butter, pepper, nutmeg. 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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