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Potato Soup

A simple soup made with onions, butter, water, potatoes, pepper, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Potato Soup

Why it works: Onion and potato 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

Build the base

  1. In a large pot, melt the butter over medium heat.

  2. Add the chopped onions and sauté until soft.

  3. Pour in the water and bring to a boil for 10 minutes.

Cook the potatoes

  1. Add the sliced potatoes, pepper, and salt.

  2. Stir with a wooden spoon until the potatoes are soft and have broken down into a pulp.

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. Onion + potatotop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

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

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

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

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

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

  4. Butter + potatotop 13% of all pairs
    Smell alikemoderate
    Cooked together6,456 recipes

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

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

    Shared aroma: decanal (soap, orange peel).

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

What each ingredient does

Onions
Softened onions add sweetness and a savory base flavor to the soup.
Butter
Melted butter adds fat, richness, and flavor to the onions before the water goes in.
Potatoes
Potato starch thickens the soup and gives it body as the potatoes break down.

The step that matters

Stir until the potatoes break down. Potatoes must be fully soft for their starch to release and thicken the liquid. If they are undercooked, the soup stays thin and lumpy.

Swap the onion

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

  1. Capsicumfits about as well
  2. Chivefits about as well
  3. Onionthe original
  4. Carrotfits about as well

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