Name: Mashed Sweet Potatoes
Ingredients: sweet potatoes; rich milk; heavy cream; coarse sea salt; black pepper; sugar; butter

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 ↓

Mashed Sweet Potatoes

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Steam sweet potatoes until tender.
Mash the sweet potatoes and add enough rich milk and heavy cream to make them quite wet.
Season with coarse sea salt, black pepper, and a little sugar, then beat the mixture until well combined.
Transfer to a buttered baking dish and place bits of butter on top.
Bake in a hot oven at 400°F (200°C) until golden brown.

Recipe from a historical cookbook (Internet Archive).

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.

Milk + buttertop 7% of all pairs

Smell alikemoderate

Cooked together81,283 recipes

Shared aroma: (z)-4-heptenal (biscuit, cream).
Cream + buttertop 8% of all pairs

Smell alikemoderate

Cooked together41,516 recipes

Shared aroma: delta-dodecalactone (sweet, creamy).
Cream + sugartop 9% of all pairs

Smell alikemoderate

Cooked together43,450 recipes

Shared aroma: 2,3-butanedione (butter, sweet).
Sweet potato + peppertop 11% of all pairs

Smell alikemoderate

Cooked together1,015 recipes

Shared aroma: 2-nonenal (fatty, green).
Sweet potato + milktop 15% of all pairs

Smell alikemoderate

Cooked together596 recipes

Shared aroma: 4-heptenal (creamy, biscuit).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

Swap the sweet potato

How well each one fits the dish's main ingredients (milk, cream, pepper, sugar, butter):

Potatofits better
Capsicumfits better
Sweet potatothe original
Leekfits about as well

Fit is the average pairing score against milk, cream, pepper, sugar, butter. Candidates are from the same food group and used in at least 100 recipes.