Name: Scotch Potato Soup
Ingredients: 1 ½ lbs mutton (shoulder); 5 quarts cold water; 6 medium-sized potatoes; 2 carrots, grated; 2 small turnips, chopped; ½ head of cabbage, chopped; 1 onion, chopped; a little parsley, chopped

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 Potato Soup

Ingredients

Directions

In a large pot, add the mutton and cold water, then bring to a boil.
Once boiling, add the potatoes, grated carrots, chopped turnips, cabbage, onion, and parsley.
Simmer slowly for four hours, skimming the surface often.

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.

Carrot + parsleytop 1% of all pairs

Smell alikestrong

Cooked together8,053 recipes

Shared aroma: 2,4-decadienal (seaweed).
Carrot + turniptop 1% of all pairs

Smell alikestrong

Cooked together8,002 recipes

Shared aroma: coumarin (sweet, hay).
Turnip + cabbagetop 2% of all pairs

Smell alikestrong

Cooked together897 recipes

Shared aroma: coumarin (sweet, hay).
Turnip + parsleytop 2% of all pairs

Smell alikestrong

Cooked together2,842 recipes

Shared aroma: coumarin (sweet, hay).
Potato + oniontop 3% of all pairs

Smell alikemoderate

Cooked together9,023 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

Mutton: Provides the meat and rich, savory flavor that forms the base of the broth.
Potatoes: Break down slightly during long simmering, adding body and thickening the soup.
Carrots: Add sweetness and color as they soften into the broth.
Turnips: Contribute a mildly sharp, earthy flavor that softens during simmering.
Cabbage: Adds mild sweetness and bulk, becoming tender over the long simmer.

The step that matters

Skimming the surface during the simmer. Removing the foam and fat that rise as the mutton cooks keeps the broth clear and prevents a greasy, cloudy soup.

Swap the cabbage

How well each one fits the dish's main ingredients (mutton, potato, carrot, turnip, onion, parsley):

Leekfits better
Parsnipfits better
Chivefits better
Cabbagethe original

Fit is the average pairing score against mutton, potato, carrot, turnip, onion, parsley. 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.

Mutton Broth292 recipes

Potato Croquettes255 recipes

Carrot Soup134 recipes

Potato Rolls78 recipes

Like knowing why a recipe works?

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.

Scotch Potato Soup