Why it works: Onion and parsley are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 25,843 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Ham Toast
Ingredients
Directions
Make the ham filling
Melt the butter in a skillet.
Add the minced onion and chopped ham; stir and cook for 3-4 minutes.
Beat the eggs with water until light, then add the minced parsley.
Pour the egg mixture into the skillet; stir quickly over low heat until creamy.
Serve
Serve the mixture heaped on hot buttered toast.
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.
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Butter + hamtop 16% of all pairsSmell alikemoderateCooked together5,475 recipes
Shared aroma: trans-2-decenal (waxy, orange).
-
Ham + eggtop 17% of all pairsSmell alikemoderateCooked together4,526 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Set into a creamy, soft mass that binds the ham and onion together.
- Cooked ham
- Provides the savory, meaty flavor and chewy bite of the filling.
- Butter
- Adds richness and carries the flavor of the onion and ham in the skillet.
- Minced onion
- Adds sharp aromatic sweetness that deepens as it cooks in butter.
The step that matters
Stir the eggs quickly over low heat. Eggs turn from creamy to dry, rubbery curds if overcooked or heated too hard. Gentle, constant stirring over low heat keeps the proteins tender and the texture smooth.
Swap the onion
How well each one fits the dish's main ingredients (butter, ham, egg, parsley):
- Shallotfits better
- Leekfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against butter, ham, egg, parsley. 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