Why it works: Butter and cheese are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 7,962 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Potatoes Au Gratin
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
Dice the cold boiled potatoes and season with salt and pepper.
Layer
Layer half of the potatoes in a baking dish.
Add half of the white sauce and half of the crumbled cheese on top.
Repeat the layers with the remaining potatoes, sauce, and cheese.
Top and bake
Top with cracker crumbs moistened with melted butter.
Bake at 400°F (200°C) until the crumbs are 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.
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Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Sauce + buttertop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Potato + cheesetop 15% of all pairsSmell alikemoderateCooked together959 recipes
Shared aroma: sotolon (curry, maple).
Sauce and butter barely smell alike, yet cooks put them together in 15,338 recipes: they 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
- Cold boiled potatoes
- Form the bulk of the dish, holding structure and body under the sauce.
- White sauce
- Provides moisture and a creamy binding that keeps the layers tender.
- Crumbled cheese
- Melts into the sauce and adds savory richness and flavor.
- Cracker crumbs
- Form a crisp top layer that browns in the oven.
- Butter
- Adds fat that helps the cracker crumbs brown and taste rich.
The step that matters
Bake until the crumbs are brown. Baking long enough lets the crumb topping brown through the Maillard reaction, which adds color and toasted flavor. Stopping early leaves the top pale and soft, while overbaking can dry the sauce.
Swap the potato
How well each one fits the dish's main ingredients (sauce, butter, cheese, pepper):
- Capsicumfits better
- Mustardfits better
- Tomatofits about as well
- Potatothe original
Fit is the average pairing score against sauce, butter, cheese, pepper. 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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