Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Queen's Onion Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the filling
Stew the onions in 2 oz of butter, adding the mixed herbs, pepper, and salt.
Prepare the breadcrumbs as you would for a pie crust.
Assemble and bake
Layer the stewed onions and breadcrumbs in a pie dish.
Bake at 350°F (175°C) for 1 hour.
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.
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Spanish onions
- Form the main body of the pie, softening into a sweet, savoury filling when stewed.
- Breadcrumbs
- Add body and absorb the buttery onion juices so the layers hold together.
- Eggs
- Bind the mixture and help it set as it bakes.
- Butter
- Adds richness and fat, helping the onions turn tender and flavourful.
The step that matters
Stewing the onions. Onions cooked too quickly can brown or scorch before they soften. Gentle stewing in butter draws out their sweetness and moisture, so the filling is tender and not watery or bitter.
Swap the onion
How well each one fits the dish's main ingredients (egg, butter, parsley, pepper, milk):
- Potatofits better
- Capsicumfits better
- Carrotfits better
- Onionthe original
Fit is the average pairing score against egg, butter, parsley, pepper, milk. 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.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes