Name: Fried Egos with Brown Sauce
Ingredients: butter; eggs; vinegar; onion juice; pepper; coarse sea salt

Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and 68,474 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Fried Egos with Brown Sauce

Ingredients

Directions

Heat a good amount of butter in a frying pan until it hisses.
Cook the eggs as directed in the previous recipe.
Keep the cooked eggs warm over boiling water.
Add more butter to the pan and fry until brown.
Stir in vinegar, onion juice, pepper, and salt.
Boil the mixture for two minutes, then pour it over the eggs and serve.

Recipe from a historical cookbook (Internet Archive).

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 aroma chemistry they share, and how many recipes mention both.

Onion + peppertop 11% of all pairs

Aroma overlapmoderate

Mentioned together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Vinegar + oniontop 14% of all pairs

Aroma overlapmoderate

Mentioned together18,226 recipes

Shared aroma: acetic acid (sour, vinegar).
Vinegar + peppertop 14% of all pairs

Aroma overlapmoderate

Mentioned together27,814 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Butter + oniontop 15% of all pairs

Aroma overlapmoderate

Mentioned together42,912 recipes

Shared aroma: decanal (soap, orange peel).
Butter + eggtop 17% of all pairs

Aroma overlapmoderate

Mentioned together118,967 recipes

Shared aroma: decanal (soap, orange peel).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Flavor stand-ins for the onion

How well each one fits the dish's main ingredients (butter, egg, vinegar, pepper):

Capsicumbetter flavor fit
Mustardbetter flavor fit
Shallotbetter flavor fit
Onionthe original

Fit is the average pairing score against butter, egg, vinegar, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).