Why it works: Potato and onion 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 ↓
Baked Potatoes with Salt Herrings, Berlin Style
Ingredients
Directions
The book gives no oven temperature. The 300°F (150°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Boil the potatoes until tender, then slice and season with salt.
Wash, skin, and bone the herrings, then cut into scallops and soak in milk.
Finely slice the onions and sauté in butter over low heat until soft but not browned.
Make the sauce
Stir in the flour and cook for a few minutes, then gradually add cream or boiled milk to create a thick sauce.
Season the sauce with salt, pepper, nutmeg, and meat glaze, then cook slowly for 20 minutes.
Pass the sauce through a fine sieve.
Assemble and bake
Butter a deep baking dish and layer the sliced potatoes, sauce, and scalloped herring alternately until full, finishing with potatoes on top.
Cover the top layer with sauce, sprinkle with bread crumbs, and dot with small pieces of butter.
Bake in a slow oven at 300°F (150°C) for 20 minutes.
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.
-
Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Potato + nutmegtop 8% of all pairsSmell alikemoderateCooked together1,052 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 dish and, once baked, soften into a tender, moist layer.
- Herrings
- Provide the main savoury flavour and a firm, flaky texture as they cook.
- Onions
- Add sweetness and aroma as they soften slowly in butter without browning.
- Butter
- Adds richness and flavour to the onions, and browns the topping when dotted over the dish.
- Flour
- Thickens the milk or cream into a smooth sauce that binds the layers together.
- Cream or boiled milk
- Forms the liquid base of the sauce, adding moisture and richness.
The step that matters
Sieving the sauce. Passing the sauce through a fine sieve removes lumps and onion bits, so the flour-thickened sauce stays smooth and evenly coats the layers instead of turning grainy.
Swap the onion
How well each one fits the dish's main ingredients (potato, milk, butter, flour, cream, pepper, nutmeg):
- Spinachfits better
- Chivefits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against potato, milk, butter, flour, cream, pepper, nutmeg. 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.
Brown Bread461 recipes
Potato Croquettes255 recipes
White Bread80 recipes
Potato Rolls78 recipes