Name: Warmed-over Beef
Ingredients: 2 tablespoons butter; 1 tablespoon flour; 1 cup stock or gravy; 1 teaspoon Worcestershire sauce; 1 tablespoon ketchup; Salt to taste; Pepper to taste; Beef, cut into small, thin slices; Toast or small potatoes for garnish

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 stir in the flour until browned slightly.
Add the stock or gravy, Worcestershire sauce, and ketchup; mix well.
Season with salt and pepper, then add the sliced beef.

Heat and serve

Simmer for 15 minutes until heated through.
Serve on a hot platter, garnished with toast or small potatoes.

Recipe from a historical cookbook (Internet Archive).

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.

Sauce + ketchuptop 1% of all pairs

Smell alikestrong

Cooked together1,099 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Beef + potatotop 8% of all pairs

Smell alikemoderate

Cooked together2,052 recipes

Shared aroma: sotolon (curry, maple).
Pepper + potatotop 9% of all pairs

Smell alikemoderate

Cooked together8,305 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + beeftop 10% of all pairs

Smell alikemoderate

Cooked together18,971 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Butter + flourtop 12% of all pairs

Smell alikelow

Cooked 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 meat that is gently reheated in the sauce.
Butter: Carries the flour and adds richness to the base of the sauce.
Flour: Thickens the sauce as it cooks with the butter and stock.
Stock or gravy: Forms the liquid base that gives the sauce its savory body.
Ketchup: Adds sweetness and acidity to the sauce.

The step that matters

Simmer until heated through. Simmering gently keeps the thin beef slices tender; boiling hard toughens meat and can thicken the sauce unevenly.

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.