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Potato Soup

A creamy soup made from boiled potatoes, milk, butter, onion, and flour.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 milk and chopped onion together.

  2. Cream the boiled potatoes until smooth.

  3. Stir the creamed potatoes into the hot milk mixture.

  4. Thicken slightly with flour as needed.

  5. Strain the soup before serving.

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

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

  3. Milk + potatotop 9% of all pairs
    Smell alikemoderate
    Cooked together3,611 recipes

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

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Potato + buttertop 13% of all pairs
    Smell alikemoderate
    Cooked together6,456 recipes

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

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 liquid base of the soup and gives it a creamy, rich body.
Potatoes
Their starch thickens the soup and creates a smooth, velvety texture when creamed.
Flour
Adds starch that thickens the soup further, giving it more body.
Butter
Adds fat that contributes richness and a smoother mouthfeel to the soup.

The step that matters

Thicken slightly with flour as needed. Flour thickens by absorbing liquid and swelling its starch when heated. Adding too much at once can make the soup pasty or lumpy, so add it gradually while keeping the soup hot and stirring.

Swap the onion

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

  1. Chivefits better
  2. Leekfits better
  3. Asparagusfits better
  4. Onionthe original

Fit is the average pairing score against milk, potato, 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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