Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Mussel Soup
Ingredients
Directions
Prepare the mussels
Boil the mussels in a saucepan until they open.
Remove the mussels from their shells and separate any seaweed.
Make the soup
In a stewpan, combine the mussels, flour, butter, parsley, and sweet herbs.
Add the rich gravy and simmer until reduced to just over half.
Serve hot with toasted bread pieces.
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.
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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
- Mussels
- Provide the main body and briny seafood flavor of the soup.
- Flour
- Thickens the liquid so the soup has body.
- Butter
- Adds richness and carries flavor through the soup.
- Rich gravy
- Forms the liquid base, which reduces to concentrate its flavor.
The step that matters
Simmer until reduced to just over half. Reducing concentrates the gravy's flavor and thickens the soup. Simmering too hard or too long can over-salt or scorch the base, so watch it closely and stop when the volume is just over half.
Swap the parsley
How well each one fits the dish's main ingredients (flour, butter):
- Jalapenofits better
- Capersfits better
- Nutmegfits better
- Parsleythe original
Fit is the average pairing score against 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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