Why it works: Celery and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 6,810 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Potato Rolls
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 400°F (200°C).
Chop the potatoes, turnip, celery, onion, parsley, and sweet herbs.
In a bowl, combine the chopped vegetables with coarse sea salt and butter.
Assemble and bake
Roll out the pastry dough thinly and cut it into squares.
Place a spoonful of the vegetable mixture on each square.
Wet the edges of the pastry, fold it over the filling, and seal it like a sausage roll.
Bake for about 30 minutes or until golden brown.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Turnip + celerytop 2% of all pairsSmell alikemoderateCooked together4,418 recipes
Shared aroma: coumarin (sweet, hay).
-
Turnip + parsleytop 2% of all pairsSmell alikestrongCooked together2,842 recipes
Shared aroma: coumarin (sweet, hay).
-
Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + parsleytop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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 soft, moist filling.
- Butter
- Adds richness and moisture to the vegetable filling.
- Onion
- Contributes aroma and savory sweetness as it softens.
- Pastry dough
- Forms a golden, crisp outer case that holds the filling.
The step that matters
Sealing the pastry edges. Wet edges must be pressed firmly together so the filling does not leak out during baking. Moisture from the vegetables can otherwise cause a weak seal to open and the filling to escape.
Swap the onion
How well each one fits the dish's main ingredients (potato, turnip, celery, parsley, butter):
- Carrotfits better
- Leekfits better
- Parsnipfits better
- Onionthe original
Fit is the average pairing score against potato, turnip, celery, parsley, butter. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Potato Croquettes255 recipes
Cream of Celery Soup113 recipes
Potato Chips53 recipes
Sweet Potato Croquettes53 recipes