Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Bref Steak and Onions
Ingredients
Directions
Prepare the onions
Peel the onions and boil them for about 30 minutes.
Drain the onions in a colander, then cut them up.
Make the onion gravy
In a frying pan, combine the onions with salt, pepper, and flour.
Add the butter and stir well.
Cook over medium heat, stirring often, until the onions are soft and slightly browned.
Serve
Return the cooked steak to the pan and heat everything together.
Serve the steak on a dish, pouring the onions and gravy over it while hot.
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 + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Soften and sweeten as they cook, forming the bulk of the gravy-like topping.
- Flour
- Thickens the butter and onion juices into a gravy that coats the steak.
- Butter
- Adds fat and richness, helping the onions brown and carrying flavour.
The step that matters
Cooking the onions until soft and slightly browned. Cooking over medium heat while stirring often lets moisture evaporate and sugars brown gently. Too high a heat scorches the flour and onions before they soften, leaving a bitter taste.
Swap the onion
How well each one fits the dish's main ingredients (pepper, flour, butter):
- Shallotfits better
- Chivefits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against pepper, flour, 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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