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
Make the white sauce
In a saucepan, melt the butter over medium heat.
Whisk in the flour, salt, and pepper to create a roux.
Gradually add the milk, stirring constantly until thickened.
Combine and serve
In a separate bowl, mix the tomato juice and baking soda; let it stand for 5 minutes.
Add the tomato mixture to the white sauce, heat through, and serve immediately.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + tomatotop 15% of all pairsSmell alikemoderateCooked together2,226 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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 body of the white sauce, which thickens as the flour cooks in.
- Butter
- Fat that cooks with the flour to form the roux that thickens the sauce.
- Flour
- Starch that thickens the butter and milk into a smooth white sauce.
- Tomato juice
- Adds acidity and liquid flavour to the sauce.
- Baking soda
- Reacts with the acidic tomato juice, changing its acidity and colour.
The step that matters
Adding the tomato mixture to the white sauce. Baking soda reacts with the acidic tomato juice, releasing gas and raising the pH. Adding it to a hot white sauce can curdle the milk, so the mixture should be combined gently and heated through without boiling.
Swap the tomato
How well each one fits the dish's main ingredients (milk, butter, flour, pepper):
- Potatofits better
- Capsicumfits better
- Chivefits better
- Tomatothe original
Fit is the average pairing score against milk, butter, flour, 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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