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Bass, with Caper-Sauce

A whole bass cooked in water with salt, pepper, onions, then served with a sauce of butter, flour, onions, lemon, and capers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Bass, with Caper-Sauce

Ingredients

Directions

Prepare the fish

  1. Scale the fish, clean it, and crimp the sides.

  2. Wash the fish.

  3. Place the fish in a kettle and cover it with water.

  4. Add salt, whole black pepper, and onions to the water.

Poach the fish

  1. Cook the fish slowly for about 6 minutes per pound.

  2. Remove the fish from the kettle.

Make the caper sauce

  1. Melt butter in a pan and add flour.

  2. Add finely chopped onions to the pan.

  3. Stir in a little fish water and some additional water.

  4. Stir in fresh butter, then add lemon slices and capers.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Lemon + caperstop 5% of all pairs
    Smell alikestrong
    Cooked together1,222 recipes

    Shared aroma: coumarin (sweet, hay).

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

    Shared aroma: isobutyraldehyde (malty, green).

  4. Onion + caperstop 7% of all pairs
    Smell alikestrong
    Cooked together1,381 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Pepper + oniontop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

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 texture and flavor.
Flour
Thickens the butter and water mixture into a smooth, cohesive sauce.
Capers
Add briny, acidic flavor that cuts through the richness of the butter sauce.
Lemon slices
Contribute bright acidity and aroma to the sauce and fish.

The step that matters

Stir the flour into the melted butter before adding liquid. Cooking flour in fat first coats the starch granules so they disperse evenly; adding liquid too early or without stirring causes lumps in the sauce.

Swap the onion

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

  1. Shallotfits better
  2. Arrowrootfits better
  3. Kalefits better
  4. Onionthe original

Fit is the average pairing score against pepper, butter, flour, lemon, capers. 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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