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Potato Soup

A simple soup of boiled potatoes, onions, butter, tapioca, and milk, seasoned with pepper and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Potato Soup

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 ↓

Potato Soup

Ingredients

Directions

  1. Boil the potatoes and onions in water until soft.

  2. Rinse through a colander and return to the fire.

  3. Add pepper, salt, and butter.

  4. When it boils, stir in the tapioca and simmer for 15 minutes, stirring to keep clear.

  5. Finally, add the milk and heat through.

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.

Photo for illustrative purposes only · Contact us to use it

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 when boiled to give the soup body and a thick, starchy base.
Tapioca
Starch that thickens the soup as it simmers, giving it a smooth, clear-looking body.
Butter
Adds richness and a silky mouthfeel to the finished soup.
Milk
Adds creaminess and mild sweetness, and softens the soup's flavour when heated through.
Onions
Soften in the boiling water, adding savory aroma and depth to the broth.

The step that matters

Stirring the tapioca while it simmers. Tapioca settles and can clump or scorch on the bottom of the pot if not stirred. Constant stirring keeps the starch dispersed so it thickens evenly and the soup stays clear.

Swap the onion

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