Name: Beef Sandwiches
Ingredients: 1 cup rare roast beef, chopped fine; ¼ teaspoon celery salt; 2 teaspoons tomato ketchup; 1 teaspoon Worcestershire sauce; 10 drops onion juice; 1 tablespoon melted butter; buttered bread slices

Why it works: Ketchup and sauce 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 ↓

Beef Sandwiches

Ingredients

Directions

In a bowl, combine the chopped roast beef, celery salt, tomato ketchup, Worcestershire sauce, onion juice, and melted butter. Mix the ingredients well.
Spread the mixture between thin slices of buttered bread.

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.

Ketchup + saucetop 1% of all pairs

Smell alikestrong

Cooked together1,099 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Celery + tomatotop 4% of all pairs

Smell alikemoderate

Cooked together3,377 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Beef + oniontop 7% of all pairs

Smell alikemoderate

Cooked together17,092 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Butter + breadtop 7% of all pairs

Smell alikemoderate

Cooked together27,232 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Celery + oniontop 7% of all pairs

Smell alikemoderate

Cooked together18,518 recipes

Shared aroma: guaiacol (smoky, sweet).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Rare roast beef: Provides the main meaty filling and the savory flavor of the sandwich.
Melted butter: Adds richness and moisture so the filling feels soft and spreadable.
Tomato ketchup: Adds sweetness and acidity to balance the savory beef.
Worcestershire sauce: Adds savory depth and a tangy, umami flavor to the filling.

Swap the celery

How well each one fits the dish's main ingredients (beef, tomato, ketchup, sauce, onion, butter, bread):

Garlicfits about as well
Capersfits about as well
Celerythe original
Thymefits about as well

Fit is the average pairing score against beef, tomato, ketchup, sauce, onion, butter, 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.