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 ↓
Scalloped Potatoes
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
Wash and peel the potatoes.
Soak them for 30 minutes, then cut into 1-inch slices.
Layer and bake
Butter a baking dish and add a layer of sliced potatoes.
Sprinkle with salt and pepper, dredge with flour, and dot with 1 tablespoon of butter.
Repeat layers until the dish is nearly full.
Cover with hot milk.
Bake for 1.5 hours at 350°F (175°C) or cook slowly on the back of the stove.
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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Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Cheese + milktop 10% of all pairsSmell alikemoderateCooked together4,426 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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, becoming tender as they cook in the milk.
- Flour
- Thickens the milk into a creamy sauce that binds the layers together.
- Butter
- Adds richness and carries flavor, helping the top brown in the oven.
- Milk
- Forms the creamy sauce that the potatoes absorb and cook in.
The step that matters
Cover with hot milk. Starting with hot milk helps the sauce thicken evenly and keeps the cooking time predictable, while cold milk can slow the process and cause uneven results.
Swap the potato
How well each one fits the dish's main ingredients (butter, pepper, flour, cheese, milk):
- Potatothe original
- Capsicumfits about as well
- Asparagusfits less well
- Chivefits less well
Fit is the average pairing score against butter, pepper, flour, cheese, milk. 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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