Why it works: Beef and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,092 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Beef, Hashed
Ingredients
Directions
Prepare
Melt the butter in a pan.
Add the diced bacon and sliced onions, and fry until light brown.
Lay the slices of beef in the pan.
Pour the Spanish and tomato sauces over the beef.
Cook slowly for 30 minutes without boiling.
Serve
Serve garnished with fried bread croutons.
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.
-
Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beef + tomatotop 8% of all pairsSmell alikemoderateCooked together5,448 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + saucetop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
Butter and sauce barely smell alike, yet cooks put them together in 15,338 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
- Cold roast beef
- Provides the meat that becomes tender as it heats gently in the sauce.
- Onion
- Adds sweetness and savoury depth as it browns in the fat.
- Streaky bacon
- Adds smoky, salty fat that flavours the onion and the sauce.
- Butter
- Carries the frying of bacon and onion and adds richness.
- Spanish sauce
- Forms the main savoury sauce that moistens the beef.
- Tomato sauce
- Adds acidity and sweetness that brighten the sauce.
The step that matters
Cook slowly for 30 minutes without boiling. Gentle heat keeps the beef tender and the sauce smooth, while a rolling boil can toughen the meat and cause the sauce to reduce unevenly or stick.
Swap the tomato
How well each one fits the dish's main ingredients (beef, onion, butter, sauce):
- Potatofits better
- Chivefits about as well
- Tomatothe original
- Leekfits about as well
Fit is the average pairing score against beef, onion, butter, sauce. 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.
More beef hash recipes
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.
Tomato Soup526 recipes
Roast Beef211 recipes
Beef Loaf175 recipes
Cream of Tomato Soup107 recipes