Name: Oyster Soup
Ingredients: 3 pints large fresh oysters; 2 tablespoons butter, rolled in flour; 1 bunch sweet herbs (such as marjoram); 1 saucer chopped celery; 1 quart rich milk; Pepper to taste; Several slices of bread, toasted

Why it works: Marjoram and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 2,609 recipes. Both carry estragole, which smells anise, licorice. The science ↓

Oyster Soup

Ingredients

3 pints large fresh oysters
2 tablespoons butter, rolled in flour
1 bunch sweet herbs (such as marjoram)
1 saucer chopped celery
1 quart rich milk
Pepper to taste
Several slices of bread, toasted

Directions

Strain the liquor from the oysters and set it on the fire.
Add pepper, butter rolled in flour, sweet herbs, and chopped celery to the liquor.
When it boils, add the quart of rich milk and bring it to a boil again.
Remove the herbs and add the oysters just before serving.
Leave the celery in the soup.
Cut the toasted bread into small squares and add them to the soup before serving.

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.

Marjoram + peppertop 3% of all pairs

Smell alikestrong

Cooked together2,609 recipes

Shared aroma: estragole (anise, licorice).
Marjoram + celerytop 4% of all pairs

Smell alikestrong

Cooked together615 recipes

Shared aroma: beta-phellandrene (minty, terpene).
Celery + peppertop 5% of all pairs

Smell alikestrong

Cooked together16,012 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Butter + breadtop 7% of all pairs

Smell alikemoderate

Cooked together27,232 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Butter + milktop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Oysters: Provide the main flavor and tender texture of the soup.
Butter: Enriches the broth and, with flour, thickens it smoothly.
Milk: Adds richness and body, creating a creamy base for the soup.
Celery: Contributes a mild, savory aroma and subtle vegetable flavor.

The step that matters

Add the oysters just before serving. Oysters cook quickly and turn rubbery and shrink if boiled for long, so they should be added at the end.

Swap the celery

How well each one fits the dish's main ingredients (oyster, butter, flour, marjoram, milk, pepper, bread):

Thymefits better
Nutmegfits better
Parsleyfits better
Celerythe original

Fit is the average pairing score against oyster, butter, flour, marjoram, milk, pepper, bread. 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.