Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Sheep’s Brains— Black Butter
Ingredients
Directions
Cook the brains as directed, then drain them on a dish.
In a frying pan, heat the salt butter until nearly black.
Add the parsley, vinegar, salt, and pepper to the pan.
Pour the mixture over the brains and serve very hot.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Parsley + vinegartop 16% of all pairsSmell alikemoderateCooked together6,477 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Salt butter
- Fat that is browned in the pan to form the nutty, bitter-tasting base of the sauce.
- Vinegar
- Adds acidity that sharpens the rich, fatty butter and balances its flavour.
- Sheep's brains
- Main protein; its soft, delicate texture is the centrepiece of the dish.
- Parsley
- Contributes fresh, green aroma that cuts through the richness of the butter.
The step that matters
Heating the butter until nearly black. Butter solids brown and then burn quickly, so the butter must be watched closely. Stopping at the right colour gives a nutty flavour rather than an acrid, burnt taste.
Swap the parsley
How well each one fits the dish's main ingredients (butter, vinegar, pepper):
- Tarragonfits about as well
- Parsleythe original
- Thymefits less well
- Dillfits less well
Fit is the average pairing score against butter, vinegar, pepper. 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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