Why it works: Sweet potato and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 1,015 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Escaloped Sweet 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
Pare the sweet potatoes and cut them into halves or thirds, depending on their size.
Assemble
Place a layer of potatoes in a baking pan and add bits of butter, pepper, and a generous sprinkling of sugar.
Add another layer of potatoes and repeat the seasoning.
Once all potatoes are layered, add enough boiling water to just show through them, but do not cover them completely.
Bake and serve
Cover the pan and bake for 1 hour in a moderate oven at 350°F (175°C).
Remove the cover and bake for an additional 30 minutes until the top is nicely browned.
Serve in the dish in which they were baked.
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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Sweet potato + peppertop 11% of all pairsSmell alikemoderateCooked together1,015 recipes
Shared aroma: 2-nonenal (fatty, green).
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Sweet potato + sugartop 17% of all pairsSmell alikemoderateCooked together1,151 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Butter + sugartop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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Sweet potato + buttertop 20% of all pairsSmell alikemoderateCooked together1,491 recipes
Shared aroma: 2,3-pentanedione (butter, sweet).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Sweet potatoes
- Form the bulk of the dish and become tender and soft as they bake.
- Butter
- Adds richness and fat, helping the top brown in the oven.
- Sugar
- Adds sweetness and helps the top caramelize and brown.
- Boiling water
- Creates moisture in the pan so the potatoes steam and soften while baking.
The step that matters
Covering the pan for the first hour. Keeping the cover on traps steam so the potatoes cook through and soften. Uncovering afterward lets the surface dry and brown.
Swap the sweet potato
How well each one fits the dish's main ingredients (butter, pepper, sugar):
- Capsicumfits better
- Potatofits about as well
- Sweet potatothe original
- Mustardfits about as well
Fit is the average pairing score against butter, pepper, sugar. 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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