Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Scotch Broth
Ingredients
Directions
Make the broth
Boil the mutton in water.
Stir in the Scotch barley and keep mixed until boiling.
Skim the surface carefully while simmering.
Add the vegetables
Add the chopped carrots, turnip, onion, green peas, parsley, pepper, and salt.
Cook the vegetables until tender, but do not overboil.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Carrot + parsleytop 1% of all pairsSmell alikestrongCooked together8,053 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Barley + turniptop 2% of all pairsSmell alikestrongCooked together629 recipes
Shared aroma: coumarin (sweet, hay).
-
Turnip + parsleytop 2% of all pairsSmell alikestrongCooked together2,842 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Lean mutton
- Gives the broth its meaty flavour and body as it simmers.
- Scotch barley
- Its starch thickens the broth and gives it a hearty texture.
- Carrots
- Add sweetness and color while holding their shape during simmering.
- Turnip
- Adds a slightly sweet, earthy flavour and firm texture to the soup.
- Green peas
- Add sweetness and a bright green color to the finished broth.
The step that matters
Skim the surface while simmering. Foam and fat rising from the mutton can make the broth cloudy and greasy. Skimming early keeps the broth clear and cleanly flavoured.
Swap the peas
How well each one fits the dish's main ingredients (mutton, barley, carrot, turnip, onion, parsley, pepper):
- Lentilsfits better
- Beansfits better
- Chickpeafits better
- Peasthe original
Fit is the average pairing score against mutton, barley, carrot, turnip, onion, parsley, pepper. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Meatless Green Pea Soup22 recipes
Indian Spiced Potato Soup with Tofu and Spinach448 recipes
Clear Carrot and Bottle Gourd Soup65 recipes
Mock Bisque Soup51 recipes