Why it works: Onion and walnut are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 1,771 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
To Hash Beef
Ingredients
Directions
Make the sauce
Slice the large onions and fry them.
Place the fried onions in a saucepan with a little gravy and cook for a few minutes.
Remove the fat and reduce the gravy.
Add a spoonful of walnut or mushroom ketchup, salt, mace, and thickening.
Add the beef and serve
Cut the beef into small pieces and toss it in the sauce without boiling.
Garnish with sippets or green pickles.
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 + walnuttop 15% of all pairsSmell alikemoderateCooked together1,771 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Onion + macetop 17% of all pairsSmell alikelowCooked together7,078 recipes
Shared aroma: eugenol (clove, spicy).
-
Walnut + macetop 20% of all pairsSmell alikelowCooked together765 recipes
Shared aroma: alpha-pinene (pine, turpentine).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Large onions
- Soften and turn sweet when fried, adding depth to the sauce.
- Gravy
- Forms the liquid base that carries the flavour of the hash.
- Walnut or mushroom ketchup
- Adds savoury, umami depth to the sauce.
- Thickening
- Thickens the reduced gravy so it clings to the meat.
- Mace
- Adds a warm, aromatic spice note to the sauce.
The step that matters
Toss the beef in the sauce without boiling. Boiling toughens meat proteins and drives out moisture, leaving the beef dry and chewy. Gentle heat keeps it tender and juicy.
Swap the mace
How well each one fits the dish's main ingredients (onion, walnut):
- Garlicfits better
- Celeryfits better
- Cuminfits better
- Macethe original
Fit is the average pairing score against onion, walnut. 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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