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Sauce

Mild Onion Sauce

A simple sauce made from boiled onions, butter, sugar, milk or cream, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Mild Onion Sauce

Ingredients

Directions

Prepare the onions

  1. Boil the onions in salted water until tender.

  2. Remove the onions and chop them finely.

Make the sauce

  1. Add the chopped onions to the melted butter.

  2. Stir in the sugar and milk or cream.

  3. Season with salt to taste.

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

    Shared aroma: decanal (soap, orange peel).

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Sugar + milktop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Onion + milktop 20% of all pairs
    Smell alikemoderate
    Cooked together13,418 recipes

    Shared aroma: hexanal (green, grassy).

Sugar and milk barely smell alike, yet cooks put them together in 77,875 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
Form the body of the sauce and, once softened, add a mild sweetness.
Melted butter
Adds fat and richness, carrying the flavor of the onions through the sauce.
Sugar
Adds sweetness that softens the sharpness of the onions.
Milk or cream
Adds moisture and a smooth, creamy texture to the sauce.

Swap the onion

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

  1. Potatofits better
  2. Sweet potatofits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against sugar, milk, butter. 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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