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 ↓
Shepherd Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare
Preheat the oven to 350°F (175°C).
Sprinkle the meat with pepper and salt, then place it in a pudding dish.
Pour the gravy over the meat.
Assemble and bake
Add milk, butter, pepper, and salt to the mashed potatoes.
Cover the meat with the potato mixture, smoothing it with a knife.
Mark the top with a fork or pipe through a forcing tube.
Bake for 45 minutes.
Serve hot.
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 + 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).
-
Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Meat + potatotop 14% of all pairsSmell alikemoderateCooked together786 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold meat
- Forms the savoury base of the pie, providing the main filling.
- Potatoes
- Form the starchy topping that becomes crisp and golden when baked.
- Gravy
- Adds moisture and savoury flavour to the meat filling.
- Butter
- Adds fat and richness to the mashed potato topping.
- Milk
- Loosens the mashed potatoes so they spread smoothly and add softness.
The step that matters
Smoothing and marking the potato topping. Potato covering the meat must seal to the edges so juices do not bubble out and burn. Marking the surface with a fork creates ridges that brown well in the oven.
Swap the potato
How well each one fits the dish's main ingredients (meat, pepper, milk, butter):
- Potatothe original
- Capsicumfits about as well
- Asparagusfits less well
- Tomatofits less well
Fit is the average pairing score against meat, pepper, milk, 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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