Why it works: Butter and mushroom are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 12,525 recipes. Both carry trans-2-decenal, which smells waxy, orange. The science ↓
Gravy Made Without Meat
Ingredients
Directions
Make the roux
Knead flour into the butter until well combined.
Fry the mixture in a frying pan over medium heat, stirring constantly until it turns a nice brown color.
Simmer and finish
Pour in boiling water and add minced onion, whole pepper, and salt.
Transfer to a small saucepan, cover, and simmer for a short time.
Strain the mixture and mix in mushroom ketchup and wine.
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 + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Mushroom + winetop 8% of all pairsSmell alikemoderateCooked together2,632 recipes
Shared aroma: 2-methoxy-4-propylphenol (allspice, anise).
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Onion + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + mushroomtop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Thickens the gravy as its starches swell in the hot liquid.
- Butter
- Carries the flour and adds richness and flavor when browned.
- Mushroom ketchup
- Adds deep savory, umami flavor to the gravy.
- Wine
- Adds acidity and aromatic depth to the gravy.
The step that matters
Frying the flour and butter until brown. Stirring constantly keeps the flour from scorching, while cooking it until nutty brown develops flavor and color. Burnt flour turns bitter, and undercooked flour leaves a raw, pasty taste and weakens thickening.
Swap the onion
How well each one fits the dish's main ingredients (flour, egg, butter, pepper, mushroom, ketchup, wine):
- Shallotfits better
- Capsicumfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against flour, egg, butter, pepper, mushroom, ketchup, wine. 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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