Why it works: Parsnip and turnip match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 590 recipes mention both. Both carry coumarin, which smells sweet, hay. The science ↓
Oyster Soup
Ingredients
Directions
Make the stock
Combine the veal and water in a soup pot.
Skim off scum as the mixture approaches boiling.
Add chopped celery, parsnip, turnip, onion, and mace.
Boil for 3–4 hours.
Strain the solids.
Add the oysters
In a small saucepan, bring the oysters and their liquor to a boil.
Strain the oyster liquor and add it to the soup pot.
Remove the gills from the oysters and set them aside.
Add the gills to the soup pot.
Thicken and serve
In a bowl, mix the butter, flour, and milk.
Gradually dilute the mixture with the stock and add to the pot.
Boil for 10 minutes.
In another bowl, mix the egg yolks and cream.
Gradually add a ladleful of hot soup to the eggs while stirring.
Remove the pot from heat.
Stir in the egg mixture and halved oysters.
Season with salt and pepper.
Serve.
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 aroma chemistry they share, and how many recipes mention both.
-
Parsnip + turniptop 1% of all pairsAroma overlapstrongMentioned together590 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + turniptop 2% of all pairsAroma overlapmoderateMentioned together4,418 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + parsniptop 3% of all pairsAroma overlapstrongMentioned together561 recipes
Shared aroma: myristicin (spice, warm).
-
Turnip + oniontop 5% of all pairsAroma overlapstrongMentioned together7,585 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + oniontop 7% of all pairsAroma overlapmoderateMentioned together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Oysters
- Provide the main flavour and tender body of the soup.
- Veal knuckle
- Gives the stock a rich, savoury body during the long simmer.
- Butter
- Adds richness and fat that carries flavour in the roux.
- Flour or cornflour
- Thickens the soup by swelling with heat when mixed with butter and liquid.
- Egg yolks
- Enrich and thicken the soup as they gently set with the cream.
- Cream
- Adds richness and a smooth, silky texture to the finished soup.
The step that matters
Adding the egg mixture. Egg yolks can curdle if they meet hot liquid directly. Tempering them with a ladleful of hot soup while stirring, then removing the pot from heat before adding them, lets them thicken smoothly.
Flavor stand-ins for the mace
How well each one fits the dish's main ingredients (oyster, celery, parsnip, turnip, veal, onion, butter):
- Parsleybetter flavor fit
- Capersbetter flavor fit
- Thymebetter flavor fit
- Macethe original
Fit is the average pairing score against oyster, celery, parsnip, turnip, veal, onion, butter. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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