Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
An Excellent Hash of Cold Beef
Ingredients
Directions
Make the sauce
Melt the butter in a thick saucepan over medium heat.
Add the minced herbs and chopped onion or shallots; cook until lightly browned.
Stir in the flour, cayenne, mace or nutmeg, and salt; cook until well colored.
Pour in the broth or gravy and let it boil gently for 15 minutes.
Strain the mixture, then add the mushroom or compound ketchup.
Finish and serve
Add the cold beef and heat gently without boiling until warmed through.
Serve the hash over fried or toasted bread sippets in a hot dish.
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.
-
Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Butter + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
-
Mushroom + breadtop 10% of all pairsSmell alikemoderateCooked together2,536 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Onion + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 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
- Butter
- Adds fat and richness, and helps the onion and herbs brown in the pan.
- Onion or shallots
- Adds savory sweetness and aroma as they brown, building the flavor base.
- Flour
- Thickens the broth into a sauce that clings to the cold beef.
- Broth or gravy
- Provides the liquid base and savory body of the hash sauce.
- Mushroom or compound ketchup
- Adds concentrated savory depth and a tangy, umami note to the sauce.
- Cold beef (in the method)
- Is the main protein, warmed gently in the sauce so it stays tender.
The step that matters
Heat the beef without boiling. Boiling toughens meat proteins and can make cooked beef dry and stringy, so warming it gently keeps it tender.
Swap the mace
How well each one fits the dish's main ingredients (butter, onion, flour, pepper, mushroom, bread):
- Thymefits better
- Garlicfits better
- Parsleyfits better
- Macethe original
Fit is the average pairing score against butter, onion, flour, pepper, mushroom, bread. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Brown Bread461 recipes
White Bread80 recipes
Bread Omelette60 recipes
Mushroom Soup60 recipes