Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Irish Stew
Ingredients
Directions
Make the stew
In a kettle, combine the mutton, sliced onion, and pot herbs.
Simmer gently for 1 hour.
Add the rice and simmer for 10 minutes.
Add the diced potatoes and cook for another 10 minutes.
Add the dumplings and serve
In a bowl, mix the flour, salt, and baking powder.
Moisten the mixture with water to form a soft dough.
Lightly form the dough into balls and drop them on top of the stew.
Cover the kettle and boil for 10 minutes.
Season to taste and serve.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Rice + potatotop 7% of all pairsSmell alikestrongCooked together851 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
-
Onion + ricetop 9% of all pairsSmell alikemoderateCooked together10,433 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Rice + flourtop 16% of all pairsSmell alikemoderateCooked together6,611 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Neck of mutton
- Provides the meat and rich fat that flavour the broth as it simmers slowly.
- Potatoes
- Break down slightly as they cook, adding body and starch that thicken the stew.
- Flour
- Forms the structure of the dumplings, holding them together when moistened and cooked.
- Baking powder
- Releases gas in the moist dough, helping the dumplings puff up and turn light.
- Rice
- Adds starch that helps thicken the broth as it cooks.
The step that matters
Drop the dough balls onto the stew and keep the lid on. The dumplings need steam from the covered kettle to cook through and rise. Lifting the lid lets steam escape, so they can turn dense and gummy. Keep the dough soft, since overworking it develops gluten and makes it tough.
Swap the onion
How well each one fits the dish's main ingredients (mutton, rice, potato, flour):
- Leekfits better
- Asparagusfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against mutton, rice, potato, flour. 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.
You might also like
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.

Mutton Broth292 recipes
Potato Croquettes255 recipes
Rice Fritters84 recipes
Potato Rolls78 recipes