Why it works: Beef and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and 17,091 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
The recipe
Ingredients
Contains: milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
The book says “a moderate oven”. The 350°F in the steps is the modern equivalent, not the book's own figure.
Prepare the sauce
Slice the cold boiled beef finely and place it in a baking dish.
Brown the chopped onion in the butter.
Sprinkle the browned onion with flour and chopped parsley, then stir well.
Add lemon juice and stock or hot water to the mixture and let it boil briefly.
Bake and serve
Pour the mixture over the beef in the baking dish.
Sprinkle with bread crumbs and bake for 30 minutes in a moderate oven (350°F / 175°C).
Optionally, omit the lemon juice and add tomato sauce or thick stewed tomatoes instead.
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 aroma chemistry they share, and how many recipes mention both.
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Beef + oniontop 3% of all pairsAroma overlapmoderateMentioned together17,091 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Parsley + lemontop 1% of all pairsAroma overlapstrongMentioned together14,036 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Butter + breadtop 3% of all pairsAroma overlapstrongMentioned together27,145 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Beef + tomatotop 3% of all pairsAroma overlapstrongMentioned together5,445 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Bread + tomatotop 4% of all pairsAroma overlapstrongMentioned together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold boiled beef
- Forms the main body of the dish, sliced finely so it warms through and absorbs the sauce.
- Butter
- Browns the onion and carries its flavour into the sauce.
- Flour
- Thickens the stock and onion mixture into a smooth sauce.
- Stock or hot water
- Provides the liquid that turns the flour and onion into a pourable sauce and moistens the beef.
- Bread crumbs
- Form a crisp, browned topping during baking.
- Lemon juice
- Adds acidity that brightens the rich sauce.
The step that matters
Let the sauce boil briefly after adding the stock. Flour only thickens fully when the liquid reaches a boil, so the sauce needs to come to a boil to avoid a thin, pasty result that does not coat the beef.
Flavor stand-ins for the tomato
The recipe marks tomato as optional. How well each one fits the dish's main ingredients (beef, onion, butter, flour, parsley, lemon, bread):
- Potatobetter flavor fit
- Carrotabout as good a flavor fit
- Tomatothe original
- Leekabout as good a flavor fit
Fit is the average pairing score against beef, onion, butter, flour, parsley, lemon, bread. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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