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Tomato Soup

A tomato soup made with beef broth, tomatoes, onion, salt, pepper, and flour.

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

Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Tomato Soup

Ingredients

Directions

Make the soup

  1. In a pot, combine the beef broth, tomatoes, and chopped onion.

  2. Season with salt and pepper to taste.

  3. Dissolve the flour in a small amount of broth and add it to the mixture.

  4. Bring to a boil and cook for 1 hour.

Finish and serve

  1. Strain the soup and serve very hot.

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. Beef + oniontop 7% of all pairs
    Smell alikemoderate
    Cooked together17,092 recipes

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

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

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

  3. Beef + tomatotop 8% of all pairs
    Smell alikemoderate
    Cooked together5,448 recipes

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

  4. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

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

  5. Beef + peppertop 10% of all pairs
    Smell alikemoderate
    Cooked together18,971 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

Beef broth
Forms the liquid base that carries the soup's savory flavor.
Tomatoes
Provide acidity, body, and the main tomato flavor.
Onion
Adds aromatic sweetness and depth to the broth.
Flour
Thickens the broth slightly, giving it more body.

The step that matters

Dissolving the flour. Flour added directly to hot liquid clumps, so it should be whisked into a small amount of broth first. Once smooth, it blends evenly and thickens the soup without lumps.

Swap the onion

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

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

Fit is the average pairing score against beef, tomato, 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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