Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Soups Without Stock
Ingredients
Directions
Make the base
Combine milk, butter, chopped onion, celery, salt, white pepper, cayenne, and celery salt in a double boiler.
Cook the mixture for 20 minutes.
Thicken
In a separate pan, cook flour and butter together for 5 minutes, being careful not to brown it.
Pour the flour-butter mixture into the soup.
Finish and vary
Add seasoning and finish the soup as desired.
Add mashed boiled potatoes to the foundation; strain through a sieve into a hot tureen for potato soup.
Add one pint stewed and sifted celery to the foundation; strain over one egg beaten to a cream, stirring well for celery soup.
Nutrition, whole recipe (rough)
What these numbers assume: 10 portions
| Ingredient | Portion assumed | kcal |
|---|---|---|
| Flour | 1 cup (125g) all-purpose | 455 |
| Potato | 1 medium (173g) baked | 161 |
| Milk | 1 cup (244ml) whole | 149 |
| Butter | 1 tbsp (14g) | 102 |
| Egg | 1 large egg (50g) | 78 |
| Cream | 1 tbsp (15ml) heavy | 51 |
| Onion | 1 medium (110g) | 44 |
| Celery | 1 stalk (40g) | 6 |
| Black Pepper | 1 tsp ground (2.3g) | 6 |
| Salt | 1 tsp (6g) | 0 |
One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.
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. See the original page.
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.
-
Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Celery + potatotop 7% of all pairsSmell alikemoderateCooked together2,047 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Onion + celerytop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Milk + potatotop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Milk
- Forms the liquid base of the soup that the other ingredients are cooked in.
- Flour
- Thickens the soup when cooked with butter and stirred into the milk.
- Butter
- Cooks with the flour to form a roux and adds richness to the soup.
- Egg
- Enriches and thickens the celery soup when strained into it.
- Potatoes
- Adds starch and body, thickening the potato soup.
The step that matters
Straining the soup over the beaten egg. Pouring the soup over the egg while stirring steadily gently warms the egg, so it blends in smoothly instead of scrambling into lumps.
Swap the white pepper
How well each one fits the dish's main ingredients (milk, butter, onion, flour, celery, potato, egg):
- Parsleyfits better
- Nutmegfits better
- Capersfits better
- White pepperthe original
Fit is the average pairing score against milk, butter, onion, flour, celery, potato, 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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