Name: Beef Roast
Ingredients: 3 pounds beef (preferably a tender cut); salt; pepper; 2 onions, sliced; 1 lemon

Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Beef Roast

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

Preheat the oven to 350°F (175°C).
Season the beef with salt and pepper.
Place the beef in a roasting pan and add the sliced onions.

Roast and serve

Roast in the oven for 1 hour, basting occasionally with its own juices.
For added flavor, squeeze lemon juice over the roast before serving.

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.

Pepper + lemontop 3% of all pairs

Smell alikestrong

Cooked together27,047 recipes

Shared aroma: trans-2-nonenal (cardboard, fatty).
Beef + oniontop 7% of all pairs

Smell alikemoderate

Cooked together17,092 recipes

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

Smell alikemoderate

Cooked together18,971 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Pepper + oniontop 11% of all pairs

Smell alikemoderate

Cooked together68,474 recipes

Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Onion + lemontop 19% of all pairs

Smell alikemoderate

Cooked together15,646 recipes

Shared aroma: decanal (soap, orange peel).

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

What each ingredient does

Beef: Forms the main body of the dish and provides the meaty flavor and texture of the roast.
Onions: Release moisture and sweetness as they roast, adding flavor to the pan juices.
Lemon: Adds acidity that brightens the rich flavor of the roasted beef.