Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Meat and Fish Sauces
Ingredients
Directions
Make the sauce
In a bowl, mix flour and butter until well combined.
Transfer the mixture to a saucepan with milk or water.
Place the saucepan in a double boiler and stir well.
Allow the mixture to come to a boil.
Add flavourings and serve
If using vegetables, boil them first, mince, and gradually add to the sauce.
To reheat, place the gravy bowl in boiling water.
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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + minttop 24% of all pairsSmell alikemoderateCooked together458 recipes
Shared aroma: phellandrene (minty).
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Butter + minttop 26% of all pairsSmell alikelowCooked together1,559 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Flour and butter barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Thickens the butter and liquid into a smooth sauce as it heats.
- Butter
- Adds richness and fat, giving the sauce a smooth, silky mouthfeel.
- Milk or water
- Provides the liquid that the flour thickens into a pourable sauce.
The step that matters
Stirring while the mixture heats. Flour must be fully mixed into the butter and liquid and stirred as it heats, otherwise it can clump or scorch. Gentle, steady stirring in a double boiler lets the starch hydrate evenly and thicken smoothly.
Swap the mint
The recipe marks mint as optional. How well each one fits the dish's main ingredients (flour, butter, milk):
- Cinnamonfits better
- Nutmegfits better
- Jalapenofits better
- Mintthe original
Fit is the average pairing score against flour, butter, milk. 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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