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Potato Soup

A creamy potato soup made with butter, onion, flour, and stock.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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

Prepare the potatoes

  1. Boil the potatoes in salted water until done, then drain and mash them finely.

Make the soup

  1. In a skillet, melt the butter and sauté the chopped onion until golden brown.

  2. Stir in the flour and the mashed potatoes, then thin the mixture with the soup stock.

  3. Strain the soup, return it to the heat, and bring to a boil.

  4. Add seasonings to taste, then 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.

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

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  4. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  5. Potato + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together5,355 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

Potatoes
Provide the starch and body that thicken the soup as they break down.
Butter
Adds fat and flavor for sautéing the onion.
Onion
Adds sweetness and aroma when browned in butter.
Flour
Thickens the soup with the mashed potatoes as it combines with the liquid.

The step that matters

Sauté the onion until golden brown. Browning the onion in butter develops sweet, savory flavors through the Maillard reaction. Pale or burnt onion changes the soup's flavor noticeably, so watch the color closely.

Swap the onion

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

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

Fit is the average pairing score against 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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