Why it works: Onion and mustard match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Eggs with Ham
Ingredients
Directions
In a skillet, melt the butter over medium heat.
Add the minced onion and brown it.
Stir in the ham and sprinkle with mustard; cook until the ham begins to crisp.
Beat the eggs and stir them into the skillet; cook until thick.
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.
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Onion + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Ham + mustardtop 14% of all pairsSmell alikelowCooked together747 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Ham + buttertop 16% of all pairsSmell alikemoderateCooked together5,475 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Egg + hamtop 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 thick, tender mass as they cook, forming the body of the dish.
- Boiled ham
- Adds savory flavor and some crisped, browned texture when cooked in butter.
- Butter
- Carries the heat and adds richness, helping the onion and ham brown.
- Onion
- Browns in the butter to add sweetness and savory depth.
- Mustard
- Adds a sharp, tangy aroma that cuts through the richness of the eggs and butter.
The step that matters
Cooking the eggs until thick. Eggs set from liquid to soft solid as proteins coagulate with heat. Cooking gently and stopping once thick keeps them tender instead of dry, rubbery, or curdled.
Swap the onion
How well each one fits the dish's main ingredients (egg, ham, mustard, butter):
- Shallotfits better
- Chivefits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against egg, ham, mustard, 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.
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