Why it works: Pepper and peas are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 5,331 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Dried-pea Soup
Ingredients
Directions
Prepare
Soak the split peas overnight.
Cook the soup
In the morning, cook the peas with the bacon for 3 to 4 hours.
Add salt and pepper to taste.
Remove the meat and pass the soup through a sieve.
Return the meat to the soup and cook until thick.
Serve
Serve with croutons.
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.
-
Pepper + peastop 15% of all pairsSmell alikemoderateCooked together5,331 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Peas + buttertop 16% of all pairsSmell alikemoderateCooked together4,887 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Split peas
- Break down during long cooking to thicken the soup and give it body.
- Bacon
- Releases fat and savoury flavour into the broth during the long simmer.
- Butter
- Adds richness and a silky mouthfeel to the finished soup.
The step that matters
Cooking until thick. The peas must cook long enough to soften fully and release their starch, which thickens the soup. Stopping too early leaves it thin and grainy, while overcooking can scorch the bottom of the pot.
Swap the peas
How well each one fits the dish's main ingredients (pepper, butter):
- Walnutfits better
- Black-eyed peafits better
- Almondfits better
- Peasthe original
Fit is the average pairing score against pepper, butter. 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.
More pea soup recipes
You might also like
Green Peas229 recipes
Green Peas Soup35 recipes
Tomato Soup526 recipes
Brown Bread461 recipesThe 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.