Why it works: Butter and capers are a kitchen classic. They rank in the top 16% of all ingredient pairs, and cooks put them together in 1,637 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Boiled Bass
Ingredients
Directions
Prepare the fish
Sew the fish in a piece of mosquito netting fitted to its shape.
Poach
In a fish kettle, bring plenty of water to a boil and add vinegar, peppercorns, mace, and salt.
Cook the fish for 10 minutes per pound plus an additional 10 minutes.
Serve
Remove the cloth and place the fish on a hot dish.
Pour drawn butter over the fish, seasoned with capers and chopped egg yolks.
Serve with mashed potatoes.
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.
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Butter + caperstop 16% of all pairsSmell alikemoderateCooked together1,637 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vinegar + caperstop 16% of all pairsSmell alikemoderateCooked together1,453 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
-
Capers + eggtop 21% of all pairsSmell alikemoderateCooked together1,311 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
-
Mace + buttertop 22% of all pairsSmell alikelowCooked together11,405 recipes
Shared aroma: linalool (floral, citrus).
Mace and butter barely smell alike, yet cooks put them together in 11,405 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
- Bass
- Forms the main body of the dish, cooking to flaky, tender flesh in the poaching liquid.
- Drawn butter
- Adds richness and moisture, coating the fish and carrying the seasonings.
- Hard boiled eggs
- Yolks add a soft, crumbly richness that complements the mild fish.
- Capers
- Add a sharp, briny acidity that cuts through the richness of the butter.
The step that matters
Cook the fish for 10 minutes per pound plus an additional 10 minutes. Fish protein sets and toughens quickly once it reaches cooking temperature, so overcooking dries and firms the flesh. Timing is judged by weight, so the fish should be weighed before it goes into the water.
Swap the mace
How well each one fits the dish's main ingredients (vinegar, butter, capers, egg):
- Tarragonfits better
- Parsleyfits better
- Dillfits better
- Macethe original
Fit is the average pairing score against vinegar, butter, capers, egg. 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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