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 ↓
Potato Souffle
Ingredients
Directions
The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the potatoes
Scrub the potatoes well in cold water.
Bake the potatoes in a 350°F (175°C) oven for 30-45 minutes, testing with a skewer.
Cut off the tops of the baked potatoes and scoop out the insides without breaking the skins.
Pass the potato flesh through a sieve until smooth.
Make the base
Melt the butter in a saucepan.
Add the milk, pepper, and salt.
Bring the mixture to a boil.
Stir in the potato flour until heated through.
Remove from heat and stir in the egg yolks one at a time, mixing well after each addition.
Whip and fold
Whip the egg whites to stiff peaks.
Fold the whipped egg whites gently into the potato mixture.
Fill and bake
Fill the potato skins two-thirds full with the mixture and place upright in a baking tin.
Bake in a 400°F (200°C) oven for 7-10 minutes until puffed and set.
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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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Form the bulk of the filling and give the soufflé its body and structure.
- Butter
- Adds fat for richness and a smoother, silkier texture in the base.
- Milk
- Supplies moisture that loosens the potato into a pourable base.
- Egg yolks
- Enrich the base and help it set as it bakes.
- Egg whites
- Whipped foam traps air, providing the lift that makes the soufflé puff.
The step that matters
Fold the whipped egg whites gently. Whipped whites hold air in a fragile foam. Vigorous stirring deflates it, leaving the mixture dense and unable to rise properly in the oven.
Swap the white pepper
How well each one fits the dish's main ingredients (potato, butter, milk, egg):
- Nutmegfits better
- Cinnamonfits better
- Parsleyfits better
- White pepperthe original
Fit is the average pairing score against potato, butter, milk, egg. 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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