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Tomato Sauce

A simple tomato sauce made by boiling tomatoes, sieving, and thickening with butter and flour, seasoned with red pepper and sea salt.

From an old cookbook · modernised transcription
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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 Sauce

Ingredients

Directions

Make the tomato base

  1. Boil the tomatoes until soft.

  2. Rub the boiled tomatoes through a sieve.

Make the sauce

  1. Melt the butter in a saucepan.

  2. Add the flour to the melted butter and stir to combine.

  3. Thin the butter‑flour mixture with the strained tomatoes.

  4. Bring the mixture to a boil.

  5. Season the sauce with red pepper and coarse sea salt to taste.

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 + 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. Flour + peppertop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Butter + peppertop 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).

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, flavor and liquid of the sauce once softened and strained.
Butter
Adds fat and richness, carrying flavor through the sauce.
Flour
Thickens the sauce when cooked with butter and combined with the liquid.

The step that matters

Add the flour to the melted butter and stir to combine. Stirring the flour into the melted butter forms a smooth roux, which prevents lumps when the tomatoes are added. Lumps form when flour is added to liquid without first being fully blended into the fat.

Swap the tomato

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

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

Fit is the average pairing score against butter, flour, 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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