Why it works: Pepper and celery match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and 16,012 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Common Peas Soup
Ingredients
Directions
Prepare the peas
Wash the split peas thoroughly and soak them overnight.
Boil the soaked peas with the baking soda in just enough water to mash them.
Make the soup
Add the mashed peas to 3 to 4 quarts of beef broth and simmer gently for 1 hour.
Remove any scum.
Pass the mixture through a sieve and reheat as needed.
Season with salt and cayenne or black pepper to taste.
Optionally, add sliced and stewed celery for extra flavor.
Serve
Serve with fried or toasted bread.
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.
-
Pepper + celerytop 5% of all pairsAroma overlapstrongMentioned together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Beef + peppertop 10% of all pairsAroma overlapmoderateMentioned together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Peas + breadtop 11% of all pairsAroma overlapmoderateMentioned together804 recipes
Shared aroma: hexyl acetate (fruity, apple).
-
Peas + celerytop 12% of all pairsAroma overlapmoderateMentioned together1,832 recipes
Shared aroma: linalool (floral, citrus).
-
Beef + breadtop 13% of all pairsAroma overlapmoderateMentioned together4,032 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Split peas
- Form the body of the soup, thickening it as they break down when cooked and mashed.
- Baking soda
- Raises the pH of the peas, helping them soften and break down quickly during boiling.
- Beef broth
- Supplies the liquid base and the main savory flavor of the soup.
The step that matters
Boil the peas with the baking soda until they mash. The peas must be soft enough to mash fully; if they are undercooked, the sieved soup will be grainy and thin. Baking soda raises the pH, which speeds softening, but too much can give a soapy taste.
Flavor stand-ins for the celery
The recipe marks celery as optional. How well each one fits the dish's main ingredients (peas, filbert, beef, pepper, bread):
- Celerythe original
- Parsleyabout as good a flavor fit
- Thymeabout as good a flavor fit
Fit is the average pairing score against peas, filbert, beef, pepper, bread. 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.
More split pea soup recipes
You might also like
Brown Bread461 recipes
Green Peas229 recipes
Roast Beef211 recipes
Beef Loaf175 recipesThe Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
Prefer an account? Create a free account for sign-in; Pro adds the full results and chemistry.