Name: Oyster Cocktail
Ingredients: 7 teaspoons vinegar; 7 teaspoons tomato ketchup; 7 teaspoons prepared horseradish; 10 teaspoons lemon juice; 1 teaspoon Tabasco sauce; 60 oysters (5 per glass)

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 ↓

Oyster Cocktail

12 glasses

Ingredients

Directions

Make the sauce

In a bowl, mix the vinegar, tomato ketchup, prepared horseradish, lemon juice, and Tabasco sauce.

Assemble

Divide the mixture into 12 glasses.
Place 5 oysters in each glass.

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).
Horseradish + lemontop 9% of all pairs

Smell alikestrong

Cooked together1,155 recipes

Shared aroma: coumarin (sweet, hay).
Ketchup + horseradishtop 10% of all pairs

Smell alikemoderate

Cooked together223 recipes

Shared aroma: ethanol (alcoholic, ethereal).
Tomato + lemontop 11% of all pairs

Smell alikemoderate

Cooked together4,592 recipes

Shared aroma: 3-hexenal (apple, fruity).
Vinegar + horseradishtop 12% of all pairs

Smell alikemoderate

Cooked together2,609 recipes

Shared aroma: isobutyraldehyde (malty, green).

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

What each ingredient does

Oysters: Provide the main body and briny seafood flavor of the cocktail.
Vinegar: Adds sharp acidity that brightens the sauce and balances the oysters.
Lemon juice: Adds fresh acidity and brightness that lifts the sauce.
Tomato ketchup: Adds sweetness and a thicker body to the sauce.
Prepared horseradish: Adds a sharp, pungent heat that cuts through the oysters' richness.

Swap the lemon

How well each one fits the dish's main ingredients (vinegar, tomato, ketchup, horseradish, sauce, oyster):

Limefits about as well
Avocadofits about as well
Lemonthe original
Grapefits about as well

Fit is the average pairing score against vinegar, tomato, ketchup, horseradish, sauce, oyster. 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.