Why it works: Sauce and ketchup match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Warmed-over Beef
Ingredients
Directions
Make the sauce
Melt the butter in a pan and add the flour, stirring until browned.
Gradually add the stock or gravy, Worcestershire sauce, and ketchup.
Finish and serve
Season with salt and pepper, then add the sliced beef.
Simmer for 15 minutes.
Serve on a hot platter, garnished with toast or small potatoes.
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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Sauce + ketchuptop 1% of all pairsSmell alikestrongCooked together1,099 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Beef + potatotop 8% of all pairsSmell alikemoderateCooked together2,052 recipes
Shared aroma: sotolon (curry, maple).
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Pepper + potatotop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + beeftop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
- Beef
- Provides the main protein, which is gently reheated in the sauce rather than cooked from raw.
- Flour
- Thickens the sauce and, when browned, adds a deeper, nuttier flavour.
- Butter
- Carries the flour's browning and adds richness to the sauce.
- Stock or gravy
- Forms the liquid base of the sauce and supplies most of its savoury flavour.
- Ketchup
- Adds sweetness and acidity that balance the savoury sauce.
The step that matters
Browning the flour. Flour cooked in butter until browned develops nutty, roasted flavour through the Maillard reaction. Stopping too early leaves a raw, pasty taste, while burning gives bitterness.
Swap the potato
How well each one fits the dish's main ingredients (butter, flour, sauce, ketchup, pepper, beef):
- Capsicumfits better
- Shallotfits better
- Horseradishfits better
- Potatothe original
Fit is the average pairing score against butter, flour, sauce, ketchup, pepper, 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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