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Tomato Sauce

A simple tomato sauce made by stewing tomatoes, seasoning, and thickening with a butter‑flour roux.

From an old cookbook · modernised transcription
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Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Tomato Sauce

Ingredients

Directions

  1. Stew the tomatoes with chopped parsley, salt, and pepper to taste.

  2. Strain the mixture and bring it to a boil.

  3. In a separate bowl, mix the flour with the butter until smooth.

  4. Add the flour mixture to the boiling sauce and stir well.

  5. Remove from heat once it boils.

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. Parsley + peppertop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

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

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

  3. Tomato + parsleytop 8% of all pairs
    Smell alikemoderate
    Cooked together5,398 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Parsley + flourtop 12% of all pairs
    Smell alikemoderate
    Cooked together16,675 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Flour and butter 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, moisture and flavour of the sauce.
Flour
Thickens the sauce as it heats with the liquid.
Butter
Adds richness and helps the flour blend smoothly into the sauce.

The step that matters

Adding the flour mixture to the boiling sauce. Flour thickens only when heated in liquid, but if it is added without being smoothed into the butter first, it can clump. Stirring well as it goes in disperses the starch so the sauce thickens evenly.

Swap the tomato

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

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

Fit is the average pairing score against parsley, pepper, flour, 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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