Why it works: Butter and milk 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 ↓
Shepherds' 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 the beef
Preheat the oven to 350°F (175°C).
Season the sliced beef with salt and pepper and place it in an earthenware dish.
In a frying pan, melt 2 tablespoons of butter over medium heat.
Add the flour to the melted butter and stir until browned.
Pour in the water, season with salt and pepper, and boil for 3 minutes.
Assemble and bake
Boil and mash the potatoes, then mix in the hot milk, remaining butter, and season with salt and pepper.
Spread the mashed potatoes over the beef and sauce in the dish.
Bake for 30 minutes.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Beef + potatotop 8% of all pairsSmell alikemoderateCooked together2,052 recipes
Shared aroma: sotolon (curry, maple).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Beef + peppertop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cold beef
- Forms the savory meat base of the pie.
- Flour
- Thickens the butter and water into a sauce once cooked briefly.
- Butter
- Adds fat and richness to the sauce and the mashed potatoes.
- Potatoes
- Form the mashed topping that bakes into a golden crust.
- Milk
- Adds moisture and creaminess to the mashed potato topping.
The step that matters
Stirring the flour until browned. Cooking flour in butter, called a roux, removes raw starch taste and thickens the liquid evenly. Stirring keeps it from scorching, which would make the sauce bitter.
“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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