Why it works: Onion and mustard match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 9,259 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Hachis Cle Boeuf — Hashed Beef
Ingredients
Directions
Make the onion base
Melt butter in a pan.
Add chopped onions.
Cook until nearly done and browned.
Stir in flour.
Moisten with stock and wine.
Season with salt and pepper.
Add the beef and serve
Let the mixture stew until thick and little sauce remains.
Add minced cold beef.
Simmer until it absorbs the onion flavor.
Serve with mustard and vinegar.
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 + mustardtop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + beeftop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + beeftop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Cooked until browned, they build the sweet, savory flavor base of the dish.
- Flour
- Stirred into the fat, it thickens the liquid into a stable sauce.
- Beef
- Provides the meat that the sauce clings to and absorbs flavor from during simmering.
- Wine
- Adds acidity and aroma to the stock, deepening the sauce's flavor.
- Butter
- Carries the onions as they cook and adds richness to the sauce.
The step that matters
Let the mixture stew until thick. Stewing reduces the liquid so the flour-thickened sauce becomes dense enough to coat the beef. Stopping early leaves it thin and watery, while over-reducing can make it pasty.
Swap the mustard
How well each one fits the dish's main ingredients (onion, butter, flour, wine, pepper, vinegar, beef):
- Shallotfits better
- Potatofits better
- Chivefits about as well
- Mustardthe original
Fit is the average pairing score against onion, butter, flour, wine, pepper, vinegar, beef. 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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