Why it works: Onion and mushroom are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 10,626 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Rump Steak, Broiled, with Onion Gravy
Ingredients
Directions
Make the onion gravy
In a saucepan, combine sliced onions with stock or water and stew gently until the liquid evaporates and the onions are slightly colored.
Add stock, pepper, and salt, then simmer until the onions are tender.
Remove the onions, mince them finely, and return to the gravy.
Stir in mushroom ketchup and boil the gravy for five minutes.
Serve
Pour the gravy onto a hot dish and place the broiled steak on top.
Serve 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 + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
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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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Pepper + mushroomtop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
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Mushroom + ketchuptop 16% of all pairsSmell alikelowCooked together2,225 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Onion + ketchuptop 19% of all pairsSmell alikelowCooked together1,997 recipes
Shared aroma: ethanol (alcoholic, ethereal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Spanish onions
- Soften and sweeten as they stew, forming the body of the gravy.
- Rump steak
- Provides the main meat, cooked by broiling for a browned surface.
- Stock
- Adds liquid and savory flavor to the onions and gravy.
- Mushroom ketchup
- Adds concentrated savory, umami depth to the gravy.
The step that matters
Stewing the onions until slightly colored. Letting the liquid evaporate and lightly browning the onions concentrates their sugars and builds a deeper flavor. Stopping too early leaves the gravy thin and pale in taste.
Swap the onion
How well each one fits the dish's main ingredients (pepper, mushroom, ketchup):
- Capsicumfits better
- Shallotfits better
- Carrotfits better
- Onionthe original
Fit is the average pairing score against pepper, mushroom, ketchup. 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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