Why it works: Parsley and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Mock Turtle Soup, of Calf's Head
Ingredients
Directions
Prepare the calf's head
Scald and clean the calf's head.
Remove the brain.
Tie the head in a cloth.
Boil for 1 hour until the meat separates from the bone.
Remove the head.
Save the broth.
Cut the meat into small pieces.
Place the meat in cold water to cool.
Combine the meat with some of the reserved broth and boil until tender.
Set the mixture aside.
Make the soup
Melt butter.
Add diced ham.
Add fine herbs.
Add parsley.
Add onion.
Pour in about 1 pint of broth.
Simmer for 2 hours.
Dredge the mixture in a small amount of flour.
Add the remaining broth and the Madeira or sherry.
Let it stew quietly for 10 minutes.
Rub the mixture through a medium sieve.
Add the calf's head pieces.
Season with cayenne pepper, coarse sea salt, lemon juice, pounded mace (if using), and sugar.
Add the prepared force-meat balls.
Serve
Serve hot after 5 minutes.
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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Parsley + lemontop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Parsley + oniontop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked 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
- Calf's head
- Provides the meat and gelatin that give the soup its body and rich texture.
- Lean ham
- Adds savoury depth and a salty, meaty flavour to the base.
- Flour
- Thickens the soup slightly as it cooks, giving a smoother body.
- Madeira or sherry
- Adds wine acidity and aromatic richness that rounds out the broth.
- Lemon juice
- Adds acidity that brightens the rich broth and balances its flavour.
- Onion
- Builds a sweet, savoury aromatic base as it softens in the butter.
The step that matters
Dredge the mixture in a small amount of flour. Too much flour leaves lumps or a pasty taste, while too little gives no thickening. Adding it to the fat-and-onion base first lets it cook out, which avoids raw flour flavour and helps the soup thicken smoothly.
Swap the onion
How well each one fits the dish's main ingredients (ham, butter, parsley, flour, sherry, pepper, lemon):
- Shallotfits better
- Carrotfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against ham, butter, parsley, flour, sherry, pepper, lemon. 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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