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Tomato Soup

A simple tomato soup made with stock, tomatoes, onion, milk, salt, pepper, and optional thickening.

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

  1. In a pot, combine the soup stock, strained tomatoes, and chopped onion.

  2. Bring to a boil and then reduce heat.

  3. Add the milk, salt, and pepper.

  4. Thicken the soup just before serving.

  5. Serve 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. 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. Coffee + milktop 10% of all pairs
    Smell alikemoderate
    Cooked together2,202 recipes

    Shared aroma: 4-heptenal (creamy, biscuit).

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

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

  5. Tomato + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together2,226 recipes

    Shared aroma: 1-octen-3-one (mushroom, metallic).

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

What each ingredient does

Strained tomatoes
Provide the main body, acidity and tomato flavour of the soup.
Milk
Adds creaminess and softens the sharpness of the tomatoes.
Onion
Adds aromatic sweetness and savoury depth to the base.
Thickening
Increases viscosity so the soup feels thicker when served.

The step that matters

Adding the milk. Milk is added to a hot, acidic tomato base and can curdle or separate if it boils. Keep the soup at a gentle heat once the milk goes in.

Swap the onion

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

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

Fit is the average pairing score against tomato, coffee, milk, 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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