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Tomato Soup

A tomato soup made with canned or fresh tomatoes, water, baking soda, milk, butter, and crackers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Tomato Soup

Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Tomato Soup

Ingredients

Directions

  1. In a pot, combine the tomatoes and boiling water; bring to a boil.

  2. Add the baking soda; it will foam up.

  3. Immediately stir in the sweet milk, salt, pepper, and butter.

  4. Once it boils again, add the crushed crackers 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. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

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

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

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

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

  4. Pepper + buttertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  5. Tomato + buttertop 22% of all pairs
    Smell alikemoderate
    Cooked together6,918 recipes

    Shared aroma: 3-hexenal (apple, fruity).

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 flavor of the soup.
Baking soda
Neutralizes tomato acidity and makes the mixture foam up when added.
Sweet milk
Adds creaminess and mellows the tomato's sharpness.
Crushed crackers
Thicken the soup slightly and add body as they soften.

The step that matters

Adding the baking soda to the hot tomato mixture. Baking soda reacts with the tomato acid and foams vigorously, so it can boil over. Stir in the milk right away, since the milk's proteins can curdle when hot acidic liquid meets them, and avoid letting the soup boil hard after the milk goes in.

Swap the tomato

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

  1. Potatofits better
  2. Capsicumfits better
  3. Tomatothe original
  4. Asparagusfits about as well

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