Why it works: Barley and parsley match in chemistry and in kitchens. They rank in the top 10% of all ingredient pairs, and cooks put them together in 630 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Barley Soup
Ingredients
Directions
Cook the barley
Wash the barley in cold water.
Drop the barley into 30 gallons of boiling water and cook slowly for about 1¼ hours.
Drain the barley and place the stock in a kettle.
Make the soup
Add the ground white pepper and coarse sea salt, and place the parsley in a bag or perforated spice box.
Bring the stock to a boil and add the drained barley.
Let it come to a boil again, then turn off the heat and remove the parsley.
Fill cans
Fill cans with the soup, stirring the kettle and dipping from the bottom to ensure even distribution of barley.
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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Barley + parsleytop 10% of all pairsSmell alikestrongCooked together630 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Parsley + white peppertop 14% of all pairsSmell alikelowCooked together1,451 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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Barley + white peppertop 33% of all pairsSmell alikelowCooked together29 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Barley
- Provides the chewy texture and body, as its starch thickens the broth as it cooks.
- Plain stock
- Forms the liquid base that carries the flavor of the whole soup.
- Parsley
- Adds a fresh, herbal aroma while steeping in the hot stock.
- Ground white pepper
- Adds a mild, warm peppery bite without dark specks in the soup.
The step that matters
Stir the kettle and dip from the bottom when filling cans. Barley is dense and sinks, so without stirring the cans filled first would get more stock and the last cans more barley. Stirring keeps the grains suspended for even distribution.
Swap the white pepper
How well each one fits the dish's main ingredients (barley, parsley):
- Thymefits better
- Dillfits better
- Celeryfits better
- White pepperthe original
Fit is the average pairing score against barley, 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.
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