Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Baked Halibut
Ingredients
Directions
The book says “a very hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 400°F (200°C).
Place the halibut in a baking tin and layer with lumps of butter.
Season with salt and pepper.
Bake and make the gravy
Bake for 15 minutes.
Dredge the fish with flour and pour boiling water over it for gravy.
Continue baking until the fish is easily pierced with a fork.
Finish and serve
Transfer the fish to a platter, add remaining butter, and keep warm.
Thicken the gravy with flour and pour it over the fish.
Add ketchup to the gravy if desired.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + ketchuptop 24% of all pairsSmell alikelowCooked together2,784 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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
- Halibut
- Provides the main protein, which firms and turns opaque as it cooks.
- Butter
- Adds fat and moisture, enriching the fish and helping the gravy taste rich.
- Flour
- Thickens the gravy so it coats the fish rather than running off.
The step that matters
Continue baking until the fish is easily pierced with a fork. Fish cooks quickly and becomes dry and chalky once overcooked. Testing for a fork-tender, flaky texture shows it is done without overbaking, since the proteins tighten as they heat.
“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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