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Tomato Sauce

A simple tomato sauce made by stewing tomatoes and onion, then thickening with butter and flour.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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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

Prepare the tomatoes

  1. Stew the can of tomatoes and the small onion for 20 minutes.

  2. Strain the mixture through a sieve.

Make the sauce

  1. In a saucepan, melt the butter until it boils.

  2. Dredge in the flour and cook thoroughly.

  3. Pour in the strained tomatoes and stir well.

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. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

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

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

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

  4. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

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 sauce.
Onion
Adds aromatic sweetness that softens as it stews with the tomatoes.
Butter
Adds fat and richness and carries flavour into the sauce.
Flour
Thickens the sauce as its starch swells in the hot butter and liquid.

The step that matters

Cook the flour in the butter thoroughly. Flour cooked only briefly keeps a raw, pasty taste and thickens unevenly. Cooking it until it smells toasted and is fully blended lets the starch swell smoothly when the tomatoes are added.

Swap the tomato

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

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

Fit is the average pairing score against onion, 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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