Why it works: Pepper and potato are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 8,305 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Cod-steaks
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the cod
Soak the cod steaks in salt water for 15 minutes.
Wipe the cod dry.
Cover the cod with salad oil and vinegar for at least 30 minutes.
Cook the cod
Broil the cod on a well-greased grill.
Butter the cod.
Season the cod with pepper and coarse sea salt.
Make and serve the potato balls
Mix a raw egg into mashed potatoes.
Form the mixture into balls.
Roll the balls in flour.
Brown the balls in a 400°F (200°C) oven.
Serve the cod with the potato balls.
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.
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Pepper + potatotop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + potatotop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod steaks
- The main protein, which is cooked by broiling and seasoned at the end.
- Raw egg
- Binds the mashed potatoes so they hold their shape when formed into balls.
- Mashed potatoes
- Form the base of the potato balls, providing soft, moist texture inside.
- Flour
- Coats the potato balls, helping them brown in the oven.
- Butter
- Adds fat and richness to the cooked cod.
The step that matters
Brown the balls in a 400°F (200°C) oven. The flour coating and the egg-bound potato need enough dry, direct heat to brown. Browning comes from the Maillard reaction, which needs surface heat and dryness, so the balls should be dry before baking.
Swap the potato
How well each one fits the dish's main ingredients (vinegar, butter, pepper, egg, flour):
- Shallotfits better
- Capsicumfits better
- Chivefits better
- Potatothe original
Fit is the average pairing score against vinegar, butter, pepper, egg, flour. 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.
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