Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Mushrooms, to Preserve
Ingredients
Directions
Prepare
Peel the mushrooms and soak them in cold water with a little lemon juice.
Dry the mushrooms carefully with a cloth.
Cook
Melt the butter in a stewpan and add the mushrooms, lemon juice, pepper, and salt.
Cook over low heat until the liquid evaporates and the mushrooms are dry, stirring to prevent sticking.
Preserve and store
Transfer the mushrooms to pots and pour clarified butter over the top.
For immediate use, they can be kept for a few days without covering.
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 + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Mushroom + buttertop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Mushroom + peppertop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
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Mushroom + lemontop 15% of all pairsSmell alikemoderateCooked together4,633 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mushrooms
- The main ingredient; cooking drives off their moisture until they are dry and concentrated.
- Butter
- Carries the cooking and, as a clarified butter layer, seals the mushrooms against air.
- Lemon juice
- Acidity that helps keep the mushrooms light in colour during soaking and cooking.
The step that matters
Cook until the liquid evaporates. Mushrooms release a lot of water as they heat. If the pan is too crowded or the heat too high, they steam and boil instead of drying, and they can stick and scorch. Low heat with stirring lets the water escape so the mushrooms are dry enough to keep.
Swap the lemon
How well each one fits the dish's main ingredients (mushroom, butter, pepper):
- Lemonthe original
- Plumfits about as well
- Mangofits less well
- Cherryfits less well
Fit is the average pairing score against mushroom, butter, 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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