Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Tomato Omelet
Ingredients
Directions
Prepare the egg mixture
Beat the eggs and milk together slightly.
Season with salt and pepper, then add the diced tomato and onion juice.
Cook and serve
Melt the butter in a pan over heat.
Add the egg mixture to the hot butter.
Hold the dish above the flame, scraping the bottom to prevent burning.
Season with cayenne 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.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + oniontop 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
- Eggs
- Set into the structure of the omelet as they cook.
- Milk
- Adds moisture and softness to the beaten eggs.
- Butter
- Fat that coats the pan and adds richness and flavor.
- Tomato
- Adds moisture and a fresh, mildly acidic flavor.
The step that matters
Scraping the bottom while holding the dish above the flame. Eggs cook quickly and can scorch or stick on direct heat. Keeping the mixture moving and the pan lifted off the flame helps the curds set gently and evenly, without browning the base before the top is cooked.
Swap the onion
How well each one fits the dish's main ingredients (egg, milk, butter, tomato, pepper):
- Capsicumfits better
- Potatofits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against egg, milk, butter, tomato, pepper. 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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