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Tomato Soup

A soup made from stock, tomatoes, onion, sugar, salt, pepper, and browned flour.

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

Why it works: Tomato and pepper are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Tomato Soup

Ingredients

Directions

Make the soup

  1. Combine stock, tomatoes, and chopped onion in a pot.

  2. Boil the mixture, then strain to remove solids.

  3. Thicken the soup with browned flour.

Finish and season

  1. Stir in the sugar, and season with salt and pepper to taste.

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. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  2. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 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. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Onion + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together32,460 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Stock
Provides the liquid base that carries the other flavors.
Tomatoes
Supply the main flavor, acidity, and body of the soup.
Onion
Adds savory aromatic depth to the soup.
Sugar
Balances the tomatoes' acidity with a touch of sweetness.
Browned flour
Thickens the soup and adds a toasted, nutty flavor.

The step that matters

Thicken the soup with browned flour. Flour thickens only when its starch is dispersed evenly in hot liquid. Added in clumps, it stays lumpy, so it should be stirred in thoroughly while the soup is hot.

Swap the onion

How well each one fits the dish's main ingredients (tomato, sugar, pepper, flour):

  1. Capsicumfits better
  2. Okrafits better
  3. Eggplantfits better
  4. Onionthe original

Fit is the average pairing score against tomato, sugar, pepper, 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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