Name: Croutes of Haddock
Ingredients: 31 ounces of butter; 4 tablespoons of milk; 1 well-beaten egg yolk; a little pepper; 1 teaspoon of lemon juice; finely minced parsley; finely minced red pepper; small rounds of hot buttered toast

Why it works: Lemon and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Croutes of Haddock

Ingredients

Directions

In a saucepan, whisk together the butter, milk, egg yolk, pepper, and lemon juice over low heat for 5 minutes until smooth.
Pile the mixture onto small rounds of hot buttered toast.
Sprinkle the tops lightly with minced parsley and red pepper, then serve.

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.

Lemon + parsleytop 1% of all pairs

Smell alikestrong

Cooked together14,037 recipes

Shared aroma: beta-phellandrene (minty, terpene).
Pepper + parsleytop 2% of all pairs

Smell alikestrong

Cooked together34,122 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Pepper + lemontop 3% of all pairs

Smell alikestrong

Cooked together27,047 recipes

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

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Milk + lemontop 15% of all pairs

Smell alikemoderate

Cooked together19,053 recipes

Shared aroma: 2-nonenal (fatty, green).