Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 8,053 recipes mention both. Both carry myristicin, which smells spice, warm. The science ↓
The recipe
Ingredients
Contains: milk, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
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.
Prepare
Preheat oven to 350°F (175°C).
Clean cod and place it in a baking dish.
Make the sauce
Melt butter in a pan and sauté onion and carrot until soft.
Add bay leaf, salt, pepper, and water to pan, then bring to a boil.
Bake and serve
Pour mixture over cod in baking dish.
Cover dish with parchment paper and bake for 30 minutes.
Garnish with chopped parsley before serving.
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 aroma chemistry they share, and how many recipes mention both.
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Carrot + parsleytop 1% of all pairsAroma overlapstrongMentioned together8,053 recipes
Shared aroma: myristicin (spice, warm).
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Pepper + parsleytop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Carrot + peppertop 3% of all pairsAroma overlapstrongMentioned together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + carrottop 4% of all pairsAroma overlapstrongMentioned together21,599 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + parsleytop 6% of all pairsAroma overlapstrongMentioned together25,834 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod
- Forms the main body of the dish, cooking gently in the surrounding liquid.
- Butter
- Adds fat and richness, carrying flavor from the vegetables into the sauce.
- Onion
- Softens and sweetens as it cooks, building a savory base for the liquid.
- Carrot
- Softens as it cooks, adding gentle sweetness to the base.
The step that matters
Bringing the mixture to a boil before pouring it over the cod. Boiling the liquid with the softened vegetables and aromatics helps extract their flavor into the water, so the sauce tastes developed rather than raw. Because the cod is baked covered, its surrounding liquid needs to be well flavored from the start.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, carrot, pepper, parsley):
- Potatobetter flavor fit
- Capsicumbetter flavor fit
- Parsnipbetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, carrot, pepper, parsley. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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.
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