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Tomato Soup

A tomato soup made by peeling tomatoes, stewing them in stock, and seasoning with pepper, salt, sugar, butter, and 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

Prepare the tomatoes

  1. Pour boiling water over the tomatoes to peel them.

  2. Cut the tomatoes, discarding the hard cores and unripe parts.

  3. Pour off the fat from the soup stock, leaving the meat and sediment.

Make the soup

  1. Add the tomatoes to the stock and stew gently for 30 minutes.

  2. Strain the mixture, rubbing the tomatoes through a sieve.

  3. Return the strained soup to the pot.

Season and serve

  1. Add pepper, coarse sea salt, sugar, and butter rolled in flour.

  2. Boil for 1 minute and 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. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 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. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  4. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  5. Pepper + flourtop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 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

Tomatoes
Provide the main body, acidity and flavour of the soup.
Butter rolled in flour
Flour thickens the soup and butter adds richness and smooth texture.
Sugar
Balances the sharpness of the tomatoes with a touch of sweetness.

The step that matters

Adding the butter rolled in flour. Flour must be fully worked into the butter before it goes in, then the soup should boil briefly. Dropping in lumps of flour can leave raw, pasty specks, while boiling thickens the starch and cooks out the raw flour taste.

Swap the tomato

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

  1. Capsicumfits better
  2. Arrowrootfits better
  3. Shallotfits better
  4. Tomatothe original

Fit is the average pairing score against pepper, sugar, 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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