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Sauce

Duaivx Bitter

A butter and flour sauce thickened with cold water, optionally enriched with eggs, nasturtiums or capers, and oysters for boiled fowl.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and capers match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 1,024 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Duaivx Bitter

Ingredients

Directions

  1. Rub the flour into the butter until well combined.

  2. Add the cold water and set the mixture into boiling water.

  3. Heat until it begins to simmer, stirring to avoid lumps.

  4. If using for fish, add chopped eggs and nasturtiums or capers.

  5. For boiled fowl, add oysters while simmering and heat through.

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. Flour + caperstop 6% of all pairs
    Smell alikestrong
    Cooked together1,024 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Butter + oystertop 12% of all pairs
    Smell alikemoderate
    Cooked together8,184 recipes

    Shared aroma: 2,6-nonadienal (cucumber, green).

  4. Egg + oystertop 14% of all pairs
    Smell alikemoderate
    Cooked together4,103 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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
Enriches the sauce with fat, giving it a smooth, rich body.
Flour
Thickens the sauce as it heats, giving it body and helping it hold together.

The step that matters

Heat until it begins to simmer, stirring to avoid lumps. Flour thickens only as its starch heats in liquid. Stirring keeps the flour dispersed so it swells evenly instead of clumping into lumps that stay in the sauce.

Swap the capers

The recipe marks capers as optional. How well each one fits the dish's main ingredients (butter, flour, egg, oyster):

  1. Capersthe original
  2. Nutmegfits about as well
  3. Parsleyfits less well
  4. Jalapenofits less well

Fit is the average pairing score against butter, flour, egg, oyster. 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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