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Milk Soup

A simple soup made with milk, water, onions, butter, flour, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 ↓

Milk Soup

Ingredients

Directions

Prepare the onions

  1. Boil the onions until tender.

  2. Press the cooked onions through a sieve into the boiling water.

  3. Add enough boiling water to make a quart.

Make the soup

  1. Season with salt.

  2. Add the milk.

  3. Rub the butter and flour together.

  4. Stir the mixture into the soup.

  5. Bring the soup to a boil while stirring continuously.

  6. Serve hot; tepid soup is not desirable.

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. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Milk + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: decanal (soap, orange peel).

  5. Onion + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together32,460 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour 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

Milk
Forms the creamy body of the soup.
Onions
Provide the main flavor and soften into the soup when pressed through a sieve.
Flour
Thickens the soup when cooked with the liquid.
Butter
Adds richness and helps blend the flour smoothly into the soup.

The step that matters

Stir the butter and flour mixture into the soup. Flour clumps if added dry or without stirring, and it only thickens properly once it is heated with the liquid. Stirring while bringing the soup to a boil keeps the mixture smooth and evenly thickened.

Swap the onion

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

  1. Potatofits better
  2. Arrowrootfits better
  3. Leekfits better
  4. Onionthe original

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