Why it works: Milk and butter 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 ↓
Mock Bisque Soup
Ingredients
Directions
Prepare the milk base
Scald the onion with the milk.
Remove the onion and thicken the milk with flour diluted in cold water, ensuring no lumps remain.
Cook in a double boiler for twenty minutes, stirring constantly at first, then occasionally.
Prepare the tomatoes
In a saucepan, cook the tomatoes until most moisture is gone, yielding about two cups of pulp.
Rub the tomato pulp through a strainer, then add sugar and baking soda.
Combine and serve
Combine the tomato mixture with the thickened milk, then strain into a hot soup tureen over butter, salt, pepper, and Tabasco sauce.
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.
Photo for illustrative purposes only · Contact us to use it
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour 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
- Milk
- Forms the creamy body of the soup once thickened with flour.
- Flour
- Thickens the scalded milk into a smooth, lump-free base.
- Tomatoes
- Provide the main flavour and acidity, reduced and strained into pulp.
- Baking soda
- Neutralises some of the tomato acidity, softening the sharp taste.
- Butter
- Adds richness and fat, melting into the hot soup for mouthfeel.
- Sugar
- Balances the acidity of the tomatoes with a touch of sweetness.
The step that matters
Thicken the milk without lumps. Flour must be diluted in cold water before it meets hot milk; added dry or undiluted it clumps, and the starch cannot disperse evenly to give a smooth thickened base.
Swap the onion
How well each one fits the dish's main ingredients (milk, butter, flour, tomato, pepper, sugar, sauce):
- Capsicumfits better
- Potatofits better
- Sweet potatofits better
- Onionthe original
Fit is the average pairing score against milk, butter, flour, tomato, pepper, sugar, sauce. 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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