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 ↓
Custard Souffle
Ingredients
Directions
The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the base
Melt the butter in a saucepan.
Stir in the flour and add the milk.
Bring to a boil and cook for 5 minutes, stirring briskly.
Add the sugar and beat in the egg yolks.
Fold and bake
Whisk the egg whites until stiff and gently fold them into the mixture.
Pour the mixture into a buttered pie dish.
Bake in a hot oven at 400°F (200°C) for about 20 minutes.
Serve with wine or fruit 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.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 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
- Eggs
- Yolks thicken and enrich the base, while whipped whites lighten it and help it rise.
- Flour
- Starch thickens the milk into a stable white sauce that holds the soufflé structure.
- Milk
- Forms the liquid base that the flour thickens and the eggs set within.
- Butter
- Fat enriches the base and adds flavor while it cooks with the flour.
- Sugar
- Sweetens the base and helps the whites hold a stable, glossy structure.
The step that matters
Fold in the egg whites gently. Whites hold air that makes the soufflé rise. Stirring or deflating them vigorously knocks out that air, so the soufflé bakes flat and dense instead of light.
“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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