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Milk Soup

Milk Soup is a creamy potato and onion soup thickened with tapioca and flavored with butter, salt, and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Milk Soup

Ingredients

Directions

Prepare

  1. Peel and chop the potatoes and onions.

  2. In a large pot, combine the potatoes, onions, butter, coarse sea salt, and water.

Make the soup

  1. Boil slowly for several hours.

  2. Strain the mixture through a colander.

  3. Return the strained liquid to the pot and add the milk and tapioca.

  4. Boil slowly, stirring constantly for 15 minutes until ready to serve.

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. Potato + oniontop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

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

  2. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

  3. Potato + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together8,305 recipes

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

  4. Potato + milktop 9% of all pairs
    Smell alikemoderate
    Cooked together3,611 recipes

    Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).

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

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

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

What each ingredient does

Potatoes
Break down during long simmering to give the soup body and a thick, starchy texture.
Milk
Adds creaminess and a rich, mild flavour to the finished soup.
Tapioca
Starch that thickens the liquid as it boils, giving a smoother, heavier body.
Butter
Adds fat for richness and a smooth mouthfeel.

The step that matters

Stirring while the milk and tapioca boil. Tapioca settles and can scorch on the bottom of the pot, and it thickens unevenly without constant stirring. Keeping the mixture moving ensures even thickening and prevents burnt flavour.

Swap the onion

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

  1. Capsicumfits better
  2. Asparagusfits about as well
  3. Tomatofits about as well
  4. Onionthe original

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