Why it works: Ketchup and sauce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Skate, Boiled in Stock
Ingredients
Directions
Prepare the stock
Skin the skate and cut it into square pieces.
In a pot, combine stock, fish trimmings, lobster or crab shell, sweet herbs, and onions.
Simmer gently for 1 hour.
Strain the stock and thicken it with brown thickening.
Add pepper, coarse sea salt, ketchup, soy sauce, and claret.
Cook and serve
Put the skate in the pot and boil until done, about 15 to 20 minutes.
Serve the skate with the sauce poured over.
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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Ketchup + saucetop 1% of all pairsSmell alikestrongCooked together1,099 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Lobster + saucetop 6% of all pairsSmell alikemoderateCooked together1,095 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Lobster + ketchuptop 9% of all pairsSmell alikemoderateCooked together48 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Fish + lobstertop 17% of all pairsSmell alikelowCooked together326 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Skate
- Its firm, flaky flesh is the main protein that cooks through in the simmering liquid.
- Brown thickening
- Starch that thickens the strained stock into a sauce that coats the fish.
- Onions
- Release sweetness and savory depth into the stock during the long simmer.
- Claret
- Adds acidity and wine flavor to the finished sauce.
- Soy sauce
- Adds salty, savory depth to the sauce.
The step that matters
Simmer the skate until just done. Fish proteins set quickly and turn dry and tough when overcooked, so the skate should be removed as soon as it is opaque and flakes easily.
Swap the onion
How well each one fits the dish's main ingredients (fish, lobster, pepper, ketchup, sauce):
- Capsicumfits better
- Horseradishfits better
- Mustardfits better
- Onionthe original
Fit is the average pairing score against fish, lobster, pepper, ketchup, sauce. 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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