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 ↓
Fondue
Ingredients
Directions
Make the base
Melt the butter in an enamelled saucepan.
Stir in the flour until well combined.
Add the hot milk and grated Parmesan cheese.
Thicken and serve
Cook on low heat, stirring constantly, until the mixture thickens to a cream-like consistency.
Avoid boiling to prevent ruining the dish.
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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Butter + parmesan cheesetop 9% of all pairsSmell alikemoderateCooked together4,163 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + flourtop 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 + parmesan cheesetop 15% of all pairsSmell alikemoderateCooked together1,608 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
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
- Butter
- Adds fat and richness, and carries flavour into the sauce.
- Flour
- Thickens the sauce by binding with the melted butter and milk.
- Milk
- Forms the liquid base and gives the sauce a smooth, creamy texture.
- Parmesan cheese
- Melts into the sauce to add savoury flavour and body.
The step that matters
Avoid boiling. High heat makes the cheese proteins tighten and fat separate, leaving the fondue grainy and oily. Gentle heat with constant stirring keeps it smooth.
“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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