Why it works: Pepper and onion 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 ↓
Beef Steak with Onions
Ingredients
Directions
Prepare the steak
Pound the rump steak until tender.
Wash and season the steak with pepper and coarse sea salt.
Heat hot lard in a frying pan.
Fry the steak
Add the steak to the pan and fry until brown on one side.
Turn the steak over and fry until browned on the other side.
Remove the steak from the pan.
Dredge the steak with flour.
Gradually add 1 cup of hot water to the pan.
Season the liquid with more pepper and salt if necessary, and bring to a boil.
Cook the onions and gravy
Peel the onions.
Boil the onions for about 30 minutes.
Drain the onions.
Cut the onions into pieces.
Add the onions, pepper, salt, flour, and butter to the pan.
Stir well and cook over heat, stirring frequently until the onions are soft and slightly brown.
Serve
Return the steak to the pan.
Heat everything together.
Serve the steak on a dish with onions and gravy poured over.
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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Pepper + oniontop 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).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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
- Rump steak
- Pounding tenderises the meat, and frying browns its surface for flavour.
- Flour
- Dredging the steak helps it brown and thickens the pan liquid into gravy.
- Onions
- They soften and turn sweet as they cook, adding body and flavour to the gravy.
- Butter
- Adds richness and fat, giving the gravy a smoother, rounder flavour.
The step that matters
Frying the steak until brown on both sides. Browning creates surface flavour through the Maillard reaction. Pan heat must be high enough to brown the meat rather than steam it, so the steak should not be crowded or moved too early.
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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