Name: To Boil Mackerel
Ingredients: 4 mackerel; ½ cup vinegar; water; 1 tablespoon coarse sea salt; fennel (for garnish)

Why it works: Vinegar and fennel work together. They rank in the top 19% of all ingredient pairs, and cooks put them together in 505 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

To Boil Mackerel

Ingredients

Directions

Prepare

Clean the mackerel well and soak them in vinegar and water for a short time.

Cook and serve

Place the mackerel in boiling salted water and cook for 15 minutes.
Serve garnished with fennel.

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.

Vinegar + fenneltop 19% of all pairs

Smell alikemoderate

Cooked together505 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

Mackerel: Forms the main protein, cooking gently in salted water until flaky and opaque.
Vinegar: Its acidity helps firm the fish and gives the flesh a brighter, cleaner flavour.

“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.