Why it works: Celery and onion are a kitchen classic. They rank in the top 5% of all ingredient pairs, and 18,506 recipes mention both. Both carry guaiacol, which smells smoky, sweet. The science ↓
The recipe
Ingredients
Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
The book says “a hot oven”. The 400°F in the steps is the modern equivalent, not the book's own figure.
Prepare the celery
Trim the celery, wash it, and cut it into slices.
Blanch the celery in salted water, then drain it.
Make the celery base
Combine the milk, bay leaf, mace, onion, and celery in a stewpan.
Boil the mixture until tender.
Remove the mace and bay leaf from the mixture.
Pass the mixture through a fine sieve.
Make the soufflé mixture
Heat the water and butter in another stewpan.
Add a pinch of celery salt and bring the mixture to a boil.
Stir in the flour briskly for a few minutes over the heat.
Add the celery puree.
Let the mixture cool slightly.
Stir in the grated Parmesan cheese.
Gradually mix in the egg yolks and whole egg.
Whisk the egg whites to stiff peaks.
Gently fold the egg whites into the mixture.
Season the mixture with a little cayenne.
Bake and serve
Pour the mixture into a pie dish and fill it only two-thirds full.
Bake the pie dish in a hot oven at 400°F (200°C) for about 10 minutes.
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.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Celery + oniontop 5% of all pairsAroma overlapmoderateMentioned together18,506 recipes
Shared aroma: guaiacol (smoky, sweet).
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Milk + buttertop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + parmesan cheesetop 3% of all pairsAroma overlapstrongMentioned together4,158 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + flourtop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Milk + parmesan cheesetop 6% of all pairsAroma overlapstrongMentioned together1,607 recipes
Shared aroma: ethyl 2-methylbutyrate (fruity, apple).
Butter and flour share little aroma chemistry, yet 122,858 recipes mention both: they likely 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
- Egg whites
- Whipped to stiff peaks, they trap air and lift the soufflé as it bakes.
- Egg yolks
- Enrich the base and help set the soufflé structure as it cooks.
- Flour
- Cooked with butter and liquid, it thickens the base so it can hold the air.
- Celery
- Provides the main flavour and, puréed, adds body to the base.
- Milk
- Forms the liquid base that is thickened and carries the celery flavour.
- Parmesan cheese
- Adds savoury, salty flavour and richness to the base.
The step that matters
Folding in the egg whites. Whites hold air only when whisked to stiff peaks, and folding gently keeps that air in the mixture. Overmixing deflates it, so the soufflé rises less in the oven.
Flavor stand-ins for the mace
How well each one fits the dish's main ingredients (celery, milk, onion, butter, flour, parmesan cheese, egg):
- Parsleybetter flavor fit
- Nutmegbetter flavor fit
- Pepperbetter flavor fit
- Macethe original
Fit is the average pairing score against celery, milk, onion, butter, flour, parmesan cheese, egg. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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