Why it works: Lemon and pepper 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 ↓
To Make Gravy Without Meat
Ingredients
Directions
Prepare
Slice the onions and fry them in a little brown butter.
Make the gravy
Add water, beer, coarse sea salt, fine lemon peel, pepper, ketchup, sweet herbs, and toasted bread.
Simmer in a saucepan for 20 minutes.
Skim off the fat and strain the gravy.
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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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Beer + buttertop 15% of all pairsSmell alikemoderateCooked together680 recipes
Shared aroma: 2-furfurylthiol (coffee, roasted).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onions
- Fried in butter, they build a sweet, savoury base that flavours the liquid.
- Beer
- Adds malty, slightly bitter depth to the liquid as it simmers.
- Toasted bread
- Its toasted starch helps thicken the gravy and adds a roasted flavour.
- Brown butter
- Adds nutty aroma and richness to the onions as they fry.
Swap the lemon
How well each one fits the dish's main ingredients (onion, beer, pepper, ketchup, bread, butter):
- Lemonthe original
- Grapefits about as well
- Applefits about as well
- Limefits about as well
Fit is the average pairing score against onion, beer, pepper, ketchup, bread, butter. 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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