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Tomato Sauce

A sauce made with butter, onion, flour, tomatoes, paprika, and salt, simmered and strained.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Tomato and onion are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Tomato Sauce

Ingredients

Directions

Brown the base

  1. Cook the butter with the onion until slightly browned.

  2. Add the flour and cook until well browned.

Add tomatoes and finish

  1. Gradually pour in the strained tomatoes while stirring constantly.

  2. Bring to a boiling point, add seasonings, and strain.

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.

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 + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 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. Butter + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

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

    Shared aroma: isobutyraldehyde (malty, green).

  5. Butter + tomatotop 22% of all pairs
    Smell alikemoderate
    Cooked together6,918 recipes

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

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

Butter
Carries the onion's flavor and adds richness as the fat base for the sauce.
Onion
Adds savory aroma and some sweetness as it browns in the butter.
Flour
Thickens the sauce as its starch swells in the hot fat and tomato liquid.
Stewed and strained tomatoes
Provide the main liquid, acidity, and tomato flavor of the sauce.

The step that matters

Adding the tomatoes gradually while stirring. Flour starch mixed with fat clumps easily when liquid goes in too fast. Pouring slowly and stirring constantly lets each granule disperse, giving a smooth sauce without lumps.

Swap the tomato

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

  1. Chivefits better
  2. Leekfits better
  3. Shallotfits better
  4. Tomatothe original

Fit is the average pairing score against butter, onion, 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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