Peas + Onion
A good pairing. Cooks put them together in 5,460 recipes, and they share 103 flavor molecules: the top 13% of all ingredient pairs.
Do peas and onion go together?
Yes. 5,460 recipes in our collection combine them, and they share 103 flavor molecules. That places them in the top 13% of every ingredient pair we score.
Why they work
More than half of peas's flavor molecules (103 of 171) also occur in onion. Among the shared key aromas are 2-isopropyl-3-methoxypyrazine (earthy, pea) and hexanal (green, grassy).
What each one brings
peas
The fresh, green side. Green notes make up 22% of its labelled aroma molecules, against 8% for onion. It carries 68 molecules onion doesn't have.
onion
The sulfurous side. Sulfurous notes make up 13% of its labelled aroma molecules, against 4% for peas. It carries 262 molecules peas doesn't have.
Add a third ingredient
- Leek: the best fit for both, top 7% of pairs with peas, top 4% with onion.
- Garlic: top 14% of pairs with peas, top 1% with onion.
- Potato: top 9% of pairs with peas, top 3% with onion.
- Beans: top 5% of pairs with peas, top 7% with onion.
Ranked by the average of its two pairing scores. Only foods used in at least 100 recipes are suggested.
Recipes with peas and onion
Almost always mains: 615 of the 726 recipes with a course label are mains (from a sample of 3,000 recipes that use both).
Can you swap one for the other?
Not really. Each has a lot the other lacks: peas has 68 molecules onion doesn't, and onion has 262 that peas doesn't. Treat them as partners, not stand-ins. This compares flavor only; texture, moisture and the job each does in a dish matter too.
All 103 shared molecules
See every shared molecule grouped by chemical class, with key aromas marked, plus the 68 only in peas and the 262 only in onion.
Peas and onion questions
Do peas and onion go together?
A good pairing. Cooks put them together in 5,460 recipes, and they share 103 flavor molecules: the top 13% of all ingredient pairs.
Why do peas and onion taste good together?
More than half of peas's flavor molecules (103 of 171) also occur in onion. Among the shared key aromas are 2-isopropyl-3-methoxypyrazine (earthy, pea) and hexanal (green, grassy).
What goes with peas and onion?
Leek is the best third ingredient: top 7% of pairs with peas and top 4% with onion. Garlic and potato also fit both.
What can you make with peas and onion?
Almost always mains: 615 of the 726 recipes with a course label are mains (from a sample of 3,000 recipes that use both). Common dishes include A Cheap Green Peas Soup, Achicha with Fio Fio (Pigeon Peas and Taro), Artichokes and Peas, Artichokes and Peas I.
Can I use onion instead of peas?
Not really. Each has a lot the other lacks: peas has 68 molecules onion doesn't, and onion has 262 that peas doesn't. Treat them as partners, not stand-ins. This compares flavor only; texture, moisture and the job each does in a dish matter too.
Compare other ingredients
Ranks compare this pair with 20,000 random ingredient pairs on CompKitchen. Molecule counts are what the studies and databases we aggregate have reported for each ingredient: a measure of coverage, not a full census. How we score pairs
Cite this analysis
Compound Kitchen (2026). Compound similarity analysis: Peas vs Onion. https://compkitchen.com/compare/peas-vs-onion. Accessed 2026-11-04.
@misc{compkitchen_compare_compound_similarity_analysis_peas_vs_onion_2026,
title = {Compound similarity analysis: Peas vs Onion},
author = {{Compound Kitchen}},
year = {2026},
url = {https://compkitchen.com/compare/peas-vs-onion},
note = {Accessed: 2026-11-04}
}
Methodology DOI: 10.5281/zenodo.19719459 · CC BY 4.0 · Citations are a request, not a requirement.