Why it works: Milk and butter 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 ↓
Boiled Potatoes
Ingredients
Directions
Prepare
Peel old potatoes. Soak new potatoes in cold water for 1–2 hours before cooking.
For new potatoes, scrape the skin off before boiling. Leave 5–6 small ones in the kettle.
Boil and drain
Place the potatoes in boiling water with 1 teaspoon of salt per quart of water.
Drain the water and shake the potatoes near an open window or door.
Return the potatoes to the heat for a few moments before serving.
Make the sauce and serve
Break the small potatoes with a potato masher, then add ½ pint of milk, 1 tablespoon of flour mixed with 2 ounces of butter, and ½ teaspoon of salt.
Thicken the mixture and pour it over the potatoes before serving.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter barely smell alike, yet cooks put them together in 124,287 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
- Potatoes
- Provide the starchy body of the dish, which softens when boiled.
- Milk
- Adds moisture and creaminess to the mashed small potatoes and sauce.
- All-purpose flour
- Thickens the milk mixture as it heats, giving the sauce body.
- Butter
- Adds richness and fat, smoothing the flour-thickened sauce.
The step that matters
Thicken the mixture. Flour must be cooked in the hot liquid so its starch swells and thickens the sauce; adding it raw or undercooking it leaves a floury, thin result.
Swap the potato
How well each one fits the dish's main ingredients (milk, flour, butter):
- Potatothe original
- Arrowrootfits about as well
- Leekfits less well
- Shallotfits less well
Fit is the average pairing score against milk, flour, 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.
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